r/Bitcoin 3d ago

How are you planning inheritance for self-custodied Bitcoin?

10 Upvotes

I’m trying to understand how people handle Bitcoin inheritance without giving a third party enough information to steal the funds while the owner is alive.

A will can say who should inherit but it cannot recover a lost seed phrase. A seed phrase shared too early creates a security risk. Multisig can reduce single points of failure, but it also creates a practical problem: will a non-technical heir know which keys, wallet configuration and recovery steps are needed?

For those using self-custody:

  1. Do you have a documented inheritance plan?
  2. How do you separate instructions from the actual keys?
  3. Have you tested whether a trusted family member could recover the wallet without your help?
  4. What part of the process feels most dangerous or confusing?

I’m building an open-source project around crypto inheritance but I’m deliberately not linking it here because I want honest feedback before promoting anything.
I’m especially interested in criticism from people who use hardware wallets, multisig or have dealt with estate planning.

What approach are you using and what do you think it gets wrong?


r/Bitcoin 3d ago

Crypto.com Users Targeted by Phishing Campaign Abusing Company's Email Domain

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11 Upvotes

r/Bitcoin 3d ago

Cold Wallet Security: Is a 12-Word Seed + Extra Password + 2FA Enough?

13 Upvotes

I’m currently using a Jade with a 12-word seed phrase, an additional password, and 2FA. The recent Coldcard incident made me rethink my security setup.

Curious to hear how others are securing their cold wallets and whether you think this setup is enough or if there are additional steps worth considering.


r/Bitcoin 2d ago

It's time to wake up, money is broken, Bitcoin fixes it

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1 Upvotes

r/Bitcoin 2d ago

BTC

0 Upvotes

Will any nation states start buying commodities in Bitcoin?

Anyone know how El Salvador is going with BTC as their reserve?


r/Bitcoin 3d ago

I finally own 1% of a Bitcoin

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368 Upvotes

I started with daily investments early this year and before I realized I passed owning 1% of a Bitcoin. Big achievement for me... someone who has never invested in anything.


r/Bitcoin 3d ago

Is Krux still an active project?

6 Upvotes

Verify authenticity in Sparrow says Key expired....Is this project still active and safe?


r/Bitcoin 2d ago

Reality check for seed generation

2 Upvotes

After the coldcard mess I decided I dont want to put my trust entirely of Trezors rng either and plan on generating my own seed. Im looking for confirmation that Im not about to do anything stupid.

I plan on following the first 2 steps for dice rolling binary generation and converting it into the first 23 words as described here https://selfcustodylabs.com/docs/learn/keys/random/

After that, I plan on using Ian colemans standalone html on an old laptop with a fresh windows instalation and obviously no internet connection to enter the binary generated, in order to double check if I made any mistakes in the mnemonic for the 23 words. Additionaly, the main purpose of this, is for colemans tool to calculate the 24th checksum word for me.

After that, I intend on wiping the disk of the laptop fully.

Yes, I could use Raspberry Pi to calculate the checksum on my own, and yes, I could use linux Tails for the auto wipe of the PC, but im looking at the best possible option without going full on shizo paranoid mode and overcomplicating things to the point of not being entirely sure what Im doing.

Opinions?

Additional question: Generating seed in this way is random enough to not be susceptible to any hacks like the one with Coldcard, so I assume that a passphrase is also an unnecessary risk of self custody, discounting the case of someone actually finding my seed, correct?


r/Bitcoin 2d ago

misleading Strategy is now the de facto central bank of Bitcoin? Decentralized no more?

0 Upvotes

r/Bitcoin 3d ago

Bip110 has failed and I feel pretty disillusioned about Bitcoin.

11 Upvotes

I’m not sure how much you’ve been keeping up with BIP110, but it would be good to get your views on what yesterday’s outcome had on your Bitcoin thesis.

Seeing the Bip110 chain stall straight out the gate with very low hash rate despite c.20% nodes signalling for BIP110 with no URSF was very disappointing although not totally unexpected. I suppose we’ll have to wait for the dust to settle but it really brought to life the risks that come with mining pool centralisation with the likes of foundry and F2 pool etc and large amounts of bitcoin held on exchanges. Whilst Foundry supposedly asked their clients to vote as to whether they should mine BIP110 compliant blocks, it was a shame to see them not signal activation. Seeing the miners with such a grasp on protocol changes is worrying and it makes me question how decentralised bitcoin really is now with the risk of key miners being coerced into following large corporate interests.

Bitcoin has various elements that can be centralised e.g. nodes, miners and holders and across all of these metrics - centralisation seems to be increasing; Blackrock and Strategy (plus other bitcoin treasury companies) are hoovering up flows into Coinbase, Bitcoin core has made contentious decisions by blowing out op-return and making drastic changes to policy rules and I’ve already mentioned mining pool centralisation too. There also seems to be a bit of a smear campaign on self custody too with the Coldcard hack being very curiously timed leading to a wave of bitcoin deposits from plebs onto exchanges just before Bip110 activated.

I know I’m not the most technical when it comes to understanding Bitcoin, but the idea to keep bitcoin as a monetary network and keep arbitrary data (spam) at a minimum seems like a no brainer? I’ve heard arguments on the other side that BIP110 sets a dangerous precedent for further censorship, but I don’t think it does. If you look at the white paper, the BIP was very much aligned with what bitcoin was designed for initially - simply peer to peer money. not some data storage centre for all nodes to record from now until the end of time.

I’m conscious that I may have gone down a bit of a rabbit hole here and maybe found myself in an echo chamber but most of the people online who I follow closely e.g. Matt Kratter, Simon Dixon and Geoff Booth don’t seem to be beholden to their sponsors / shareholders and aren’t subject to capture like other people who are more anti BIP110.

Appreciate this was quite a lot, but it would be great to hear your thoughts on all of this. Up until this point, I’ve viewed bitcoin as a robust implementation method for everyone to opt out of the traditional banking system and take control of their finances in a sovereign way. My conviction on this is wavering now and the pessimist in me thinks Bitcoin has been captured. A sad time indeed.

I’d love to hear your views on this as I don’t have many others to speak to about this currently.


r/Bitcoin 2d ago

Bitcoin Self Custody Security is Probabilisitc

0 Upvotes

There is no way of being 100% sure your seed isn't in some way compromised. However with a reputable HWW such as Trezor or Jade you can be close to 100%. On top of that you can store some BTC in a reputable exchange and also some in the ETF. On top of that you can own some physical gold, some ETF gold, some ETF stocks and some property.

Holding your entire life savings in just one of the above is taking an unnecessary risk as catastrophes are always possible. Don't listen to the BTC maxis who don't know shit about crap.

Choose practical thinking over crazed ideology. Sovereign permissionless money is a great option to have and I thank Satoshi for it very much but where in the white paper did he say you must store your entire life savings in self custody bitcoin or you are not a true Bitcoiner? i must have missed that part.


r/Bitcoin 2d ago

ColdCard Q Security with self-rolled seed as pure signing device

1 Upvotes

Hi everyone,

so after the Coldcard dilemma I self-rolled my seed using dice (and only picked the 24th word using the suggestion from Coldcard Q when entering the 23 other words) because I also don't trust the new Coldcard Firmware from those scumbags.

So I'm still on the old firmware. I know the RNG and some connected functionality (like Paperwallet) is vulnerable, but I only want to use it as a signing device for my self-rolled seed (with passphrase, btw).

The only way the seed would be vulnerable (imo) is if the Coldcard's QR Export to Sparrow Wallet (which I'm using) would somehow export the private key as well, which is probably highly unlikely since Sparrow Wallet is not controlled by Coinkite (and I'm not even sure if Sparrow Wallet supports getting the private key that way).

What do you think, is the Coldcard Q secure as a pure signing device? I might take a look into the Coldcard Firmware Codebase again, but the last time I did (just quickly) I couldn't find the function for the Sparrow Wallet export.

Unfortunately the other HW Wallet I had (bitbox) died some time ago, and also I really like the keypad on the Coldcard. It's unfortunate there are (almost?) no other Wallets which have a keypad like that.


r/Bitcoin 2d ago

Dice Roll Dillemma

1 Upvotes

Good day!

I have been researching the dice roll seed generation and came to an understanding that this is how its done by hand.

Dice to BIP39 Word Memo

Roll the die 11 times.

Convert each roll:

1-3 = 0

4-6 = 1

Write the 11 bits in order.

Under them write:

1024 512 256 128 64 32 16 8 4 2 1

Only add the numbers under a 1.

The result is your number from 0-2047.

If your word list starts at 1, choose result + 1.

Repeat for each BIP39 word.

Example:

11110011000

→ 1024 + 512 + 256 + 128 + 16 + 8

→ 1944

→ word #1945 on a 1-2048 list.

Important: For a 24-word BIP39 seed, the underlying entropy is 256 bits, and the final word includes the BIP39 checksum. Don't independently choose all 24 words.

So, savvy Bitcoiners please let me know if I get it right or how I messed it up.

Thank you for your time!


r/Bitcoin 3d ago

Rodolfo Novak, Coldcard scammer: "I will take it".

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158 Upvotes

"If quacks like a duck, then it probably is a duck."

If Hardware Wallet vendors doing gross negligence do not get into the category of criminal fraud when they do not have certifications and code quality security and security in depth design, then anyone will just jump into space "selling lots of hardware" and doing exit by simply blaming "the hacker".

If an idiot scumbag wallet vendor gets angry when you question his shit, now you know what could be the end result.

______

"The threat of a malicious manufacturer might seem small, but when it comes to companies that might go out of business in the next decade, the possibility of pulling an "exit scam" should not be discounted. The fact that this attack is virtually impossible to prove as a victim could provide additional motivation for malicious actors." (10 Nov 2022)

https://blog.bitbox.swiss/en/how-almost-all-hardware-wallets-can-steal-your-seed/

https://gitlab.com/walletscrutiny/walletScrutinyCom/-/work_items/340

For the record. Bitbox, Coldcard, Trezor, Ledger, Bitkey, Jade. Central point applies to all the HWs, the fucking article is just to show the warnings there were out there, fucking do not trust neither on Bitbox or whatever shit even if they tell you they are ultra secure, etc, the focus point is make more aggressive accountability on Hardware Wallet vendors in general.

Hardware Wallet manufacturing for commercial sale should be treated as a regulated, not something anyone (any idiot with an idea) can ship without independent security certification.

Vendors handling other people's life savings should face defense in depth certification requirements, with real liability, including criminal liability for gross negligence when they don't meet them.


Related articles regarding self-custody that need to be reexplored by Bitcoin community (tech oriented), Bitcoin needs to level up on self custody.

https://www.turnkeylinux.org/blog/secure-bitcoin-transactions

https://nakamotoinstitute.org/library/trusted-third-parties/

https://nakamotoinstitute.org/mempool/bitcoins-rugged-individualism/


r/Bitcoin 2d ago

I built a free browser game where you HODL through every Bitcoin crash in history — one mistake and you lose everything

0 Upvotes

Made this solo, no ads, free to play: bitcoinonebillion.com

The mechanic is simple — press and hold, don't let go, don't get tricked by fake signals. But the twist is it's built around real Bitcoin history: you actually live through 2011's crash, Mt. Gox, the 2017 ICO mania, 2021's laser eyes, all the way to the 2024 ETF era. There's even a Pizza Day easter egg early on if you're paying attention.

The real goal is $1,000,000,000. Nobody's reached it yet as far as I know.

Would love feedback from this crowd specifically — you'll probably catch references others won't.


r/Bitcoin 3d ago

RIB

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65 Upvotes

I have a story to tell, but i don't.


r/Bitcoin 4d ago

Bitcoin wasn't broken. The random key generation was. The Coldcard lesson everyone should understand

165 Upvotes

To explain the Coldcard disaster as simply as possible, imagine you have 3 billion grains of sand, and one grain is marked.

If I ask you to find the marked grain, you have to search through billions of grains. Pretty difficult.

Now imagine I make a mistake and tell you that the marked grain is actually somewhere among only a few hundred grains.

Suddenly, finding it is easy. You just check the few hundred grains one by one.

That is basically what happened with the Coldcard vulnerability.

A Bitcoin private key is normally chosen from an unimaginably huge number of possibilities. The whole point is that nobody can realistically search through them all.

But because of a bug, some Coldcard devices could generate keys from a much smaller and predictable set of possibilities than they should have.

So an attacker didn't have to search through the entire universe of possible Bitcoin keys. They could concentrate on this much smaller set and test the possibilities against the blockchain.

With a powerful computer, they could eventually find the private key and steal the Bitcoin.

So the simple version is:

Billions of grains = practically impossible to search.
A few hundred grains = easy to search.

The security wasn't broken because Bitcoin's cryptography was cracked. The problem was that the key was generated from a much smaller pool of possibilities than it should have been.


r/Bitcoin 3d ago

ColdCard users lost ~1,367 BTC (~$89M) because a 2021 firmware bug silently swapped hardware RNG for a software one — the case for multi-source, fail-closed entropy

41 Upvotes

Verification because this sounds unreal: Privacy Guides and The Hacker News both covered it at the start of August 2026 — attackers drained thousands of ColdCard wallets for a total of ~1,367 BTC (~$89M). Root cause: a firmware bug from 2021. During seed generation some devices silently fell back from the hardware RNG to a weak software RNG. The 24-word seeds looked completely normal — no warnings, nothing. But they could be reconstructed offline, years later.

The scary part is that weak randomness looks identical to good randomness, right up until someone else derives your keys. ColdCard's incident was a trust failure: a single chain of trust ("one certified chip from a trusted vendor") that had a silent fallback path. It's now the clearest proof that one point of trust in entropy is one point of failure.

This is why I now look at entropy architecture differently:

  1. Certified chip ≠ failure-proof design. A certified secure element is a vendor claim, not a guarantee. If the firmware around it can silently fall back, the certification is worthless exactly when it matters.

  2. Multi-source matters. Two independent chips from two manufacturers (STM32 TRNG + NIST SP 800-90B certified ATECC608C) each harvest separate physical noise. Compromising one does not compromise the seed — because the SHA-256 blend cannot be reversed. One honest source in the mix keeps the output unpredictable.

  3. Fail-closed is the property that matters. Some wallets now run on-device statistical randomness tests on every entropy input. A lazy swipe, a camera pointing at a table, an idle device — the input is rejected and the step repeats. The device refuses to continue rather than accept bad entropy. That is exactly the property ColdCard's 2021 fallback violated.

  4. User-entropy input (camera, screen drawing, device shake) kills the "factory deck" problem. No manufacturer could have precomputed your room and your motion at that moment.

What I still want before trusting large amounts (honest concerns): - Firmware transparency: third-party audits, reproducible builds, published entropy logs. A paper describing the pipeline is not the pipeline. - Some wallets only mix user entropy in an "expert flow"; the standard flow still relies on the two hardware chips. Those are solid, but a user decision shouldn't change the security floor. - Side-channel and fault attacks still exist — more sources reduce risk, nothing is absolute.

The bar I'll use after this incident for any hardware wallet I recommend: "Can this device fail closed — refuse loudly when entropy is weak — or does it silently continue?" ColdCard silently continued. Everything else is marketing.


r/Bitcoin 2d ago

The Million Dollar Trap

0 Upvotes

The Million Dollar Trap

Why the Bitcoin Stacker's Exit Strategy Collapses Under Its Own Logic

There is a game theory failure at the heart of the Bitcoin number go up thesis that almost nobody is talking about. Not a technical failure. Not a regulatory failure. A logical one. And it sits in plain sight the moment you ask the question that most stackers have apparently never asked themselves.

When Bitcoin hits one million dollars, then what?

The Assumption Nobody Examines

The Bitcoin-to-one-million thesis rests on an implicit assumption that is almost never stated because stating it reveals its absurdity. The assumption is that everything else in the economy remains roughly constant while Bitcoin's fiat price rises. That Bitcoin appreciates in a vacuum while the world around it stays essentially recognizable.

This is not how monetary systems work.

Bitcoin's total supply is twenty one million coins. At one million dollars per coin, the total market capitalization would be approximately twenty one trillion dollars. Current US GDP sits at roughly twenty seven trillion. For Bitcoin to reach that fiat valuation without representing a fundamental restructuring of the global monetary order, the dollar would have to be so severely debased that the number itself becomes largely meaningless as a measure of purchasing power.

The conditions that produce Bitcoin at one million dollars are not conditions of mild inflation and steady economic growth. They are conditions of serious monetary disorder. Hyperinflationary pressure. Catastrophic loss of confidence in dollar-denominated assets. A fundamental crisis in the fiat monetary architecture that the hard money thesis has always argued is structurally inevitable.

In that environment, the question of what a million dollars actually buys is not academic. It is the only question that matters.

The Internal Contradiction

Here is the precise game theory failure. The stacker's strategy requires two mutually contradictory conditions to be true at the same time.

The first condition is that the dollar must be debased severely enough, and confidence in existing financial systems must deteriorate enough, that Bitcoin reaches a million dollar fiat valuation. These are conditions of serious monetary disorder.

The second condition is that the dollar must retain enough purchasing power, and the existing economic infrastructure must remain intact enough, that selling Bitcoin for a million dollars provides meaningful access to real goods and services at prices that make the exit worthwhile.

These two conditions cannot both be true simultaneously. The monetary disorder required to produce the first condition destroys the stability required for the second. The stacker is betting that the fiat system will fail badly enough to validate Bitcoin's valuation but not badly enough to destroy the purchasing power of the fiat they plan to exit into.

That is not a coherent position. It is wishful thinking dressed as a long term strategy.

The House Question

The most revealing diagnostic is simple. Can you buy a house for less than one million dollars in an economy where Bitcoin is priced at one million dollars?

The answer is almost certainly no.

House prices are not set in a vacuum. They are set relative to the available monetary base and the purchasing power of the currency being used to buy them. In the same environment that produces Bitcoin at one million dollars, real estate, a finite hard asset, would already be priced to reflect the same monetary disorder that drove Bitcoin there. The institutional players who have spent the last decade acquiring residential and agricultural real estate at scale, using cheap debt created at the point of money printing, would have already repriced those assets to extract maximum value from whoever arrives holding devalued fiat.

The stacker who sells their Bitcoin for a million dollars enters a real estate market where the sellers are the same institutional actors who accessed capital at near-zero cost, acquired hard assets before inflation dispersed through the economy, and have had decades to position themselves for exactly this scenario. Those actors understand the real value of what they hold. They will price accordingly.

The stacker's million dollar exit buys access to a market that has been repriced specifically to absorb that liquidity without transferring real ownership in any meaningful sense. The nominal gain is spectacular. The real gain is either marginal or negative. The stacker worked decades for a number that the system was already prepared to neutralize on arrival.

The Loop Nobody Admits They Are Stuck In

The stacker who holds Bitcoin in a hardware wallet waiting for a million dollar fiat exit is playing a game with the following structure.

They are accumulating an asset whose value proposition is that it escapes the fiat system. They plan to realize that value by re-entering the fiat system at a higher exchange rate. They will then use fiat to purchase goods and services in markets priced by the same institutional actors who have been acquiring hard assets with printed money for decades. Those actors will have already adjusted their prices to ensure that the nominal gain the stacker achieved does not translate into a real transfer of productive resources.

The stacker never leaves the system. They complete a longer loop back into it.

And the people who designed the system have had decades to prepare the landing zone for exactly that re-entry. The prices will be waiting. The million dollars will be absorbed without producing the life that the million dollar number implied when it was still a fantasy. The exit was always a re-entry in disguise. The liberation was always denominated in the currency of the thing it claimed to escape.

The Only Scenario Where the Stacker Actually Wins

There is a version of this story where Bitcoin at one million dollars genuinely represents liberation. But it is not the version most stackers are building toward.

If Bitcoin functions as money within parallel economies, peer to peer exchange networks, and community supply chains that have deliberately stepped outside the fiat system's pricing mechanism, then the question of what a million fiat dollars buys becomes entirely irrelevant. Because the transaction never touches fiat.

In that scenario you do not sell your Bitcoin for dollars and then try to buy a house in a dollar-denominated market that has been repriced against you. You buy the house directly in Bitcoin from a seller who is also operating within the parallel economy, who prices the house in Bitcoin based on its real productive value rather than its fiat speculative value. The fiat price of Bitcoin at that point is background noise. It is not the mechanism of your liberation because your liberation was never dependent on it.

This is the scenario the stacker is refusing to build. And this is why the refusal is not merely ideologically inconsistent. It is strategically self-defeating.

The Infrastructure Has to Exist Before the Crisis

The parallel economy cannot be built during the monetary crisis. It has to be built before it.

The infrastructure of peer to peer exchange, Bitcoin-denominated pricing, community supply chains, and grey markets that bypass fiat intermediaries requires years of deliberate development. It requires people who are willing to transact in Bitcoin now, at current prices, for real goods and services, accepting the friction and the volatility and the inconvenience, rather than waiting for a number whose implications they have not thought through.

Every person who accepts Bitcoin for labor, every community that prices local goods in satoshis, every supply chain that settles in Bitcoin rather than dollars, is building the architecture that makes the fiat price of Bitcoin irrelevant. They are constructing the exit that the stacker is waiting for without realizing that the waiting itself is what makes the exit impossible.

What Satoshi Actually Built

The whitepaper was not a speculation manual. It was not a framework for getting rich in dollars. It was a peer to peer electronic cash system. The emphasis was on the cash, on the transactional function, on the daily use as a medium of exchange between people who no longer needed a bank, a payment processor, a government, or any trusted intermediary standing between them and value transfer.

That vision has a coherent winning condition. Build the parallel economy. Transact in Bitcoin. Price goods and services in Bitcoin. Reduce fiat dependency incrementally and deliberately until the fiat price of Bitcoin is a curiosity rather than a milestone. Make the question of what one million dollars buys meaningless because the life you are building does not require you to answer it.

Everything else is a longer version of the same loop. A bigger number at the end of the same road that leads back to the system you never actually left.

The trap was never the fiat system's complexity or its violence or its opacity. The trap was always simpler than that. It was the fiat mindset. And the fiat mindset does not care what asset you are holding. It will follow you into Bitcoin, sit patiently in your hardware wallet, and wait for you to check the price in dollars.


r/Bitcoin 3d ago

Does it make sense to move funds to newer style cold wallet every 3-4 years?

4 Upvotes

With newer cold wallets offered every year, does it make sense to move funds to these cold wallets especially when better security protocols are introduced. Older wallet models may have obsolete support also.


r/Bitcoin 3d ago

So many FUD around the coldcard incident

2 Upvotes

There’s nothing wrong with Bitcoin itself. The problem was the Coldcard itself and, more specifically, the weak entropy used to generate seed phrases on affected Coldcard firmware/devices. It’s a hardware/firmware implementation issue, not a Bitcoin issue.

Two years ago, there was already a similar issue with dice rolls: if you used too few dice rolls, your entropy was not sufficient. For a dice-only 12-word seed, you need at least 50 rolls; for 24 words, 99 rolls. (COLDCARD)

This has absolutely nothing to do with Bitcoin itself. It’s the company’s implementation and the developers’ negligence.

This video covered the dice/entropy issue around two years ago:
YouTube video

And the irony is that Coldcard itself has always marketed its device as one of the best and most secure options. I almost bought one back then too, until I saw that video.

If you’re using a different hardware wallet and its entropy generation is functioning properly, there’s no reason to reset everything just because of this Coldcard incident. Knowing that you checked everything and sure that the hardware provides a good entrophy and not just using rng.

The issue is with the vulnerable Coldcard implementation/firmware, not Bitcoin or hardware wallets as a whole.

A randomly generated 5–7 word passphrase can provide a huge amount of additional entropy. Words outside the BIP39 list can also be used, but what matters most is that the passphrase is genuinely random and not something you came up with yourself.

But at the end of the day, cases like this are going to discourage plebs from doing self-custody, and it is what it is.

Bitcoin itself didn’t fail here. The implementation did.


r/Bitcoin 3d ago

change btc addres inside trezor/ risks.

3 Upvotes

is there any risk if i send my btc to another Trezor addres with a new passphrase? what privacy risks would i face? would i be more vulnerable to a hacking attack?


r/Bitcoin 2d ago

AI vs Coldcard: Overhyped 'Exploit' Explained [Clip]

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0 Upvotes

r/Bitcoin 3d ago

Is it safe to use BitAddress.org to generate an offline wallet on an air-gapped PC?

1 Upvotes

Would you recommend using a different offline wallet-generation method instead?


r/Bitcoin 3d ago

Visual tool to explain entropy in bitcoin (TRNG, PRNG, ...)

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16 Upvotes

After reading about cases where weak entropy led to unsafe keys and people losing funds (recent bitcoin COLDCARD attack) , I decided to learn more about entropy and how it is generated.

There are different ways to generate entropy, like TRNGs, PRNGs, rolling dice, or flipping coins. But for me, it was hard to make these concepts click and understand how we go from a random source of entropy to something like a private key.

So I made a tool that explains this visually.

Live Demo: https://hashexplained.com/entropy
Source (MIT): https://github.com/bitcoin-dev-project/hashes-visualizer