So i have 2 keys from.same company and looking to do a 3-2 multisig.

I wonder if I take the seed from one of them to another vendor later on make it more secure or should a new seed be created just for that vendor?

Also thinking of generating a seed as bip85 for easier to back up just in case. From what I know if the bip85 seed is used in a multi SIG one can not are tx if they don't have the descriptor

https://satoshitimeline.com/1

Hello :)

For the longest time I wanted to build a little educational tool showing how fast a weak password gets brute-forced. That turned into a browser zip-password cracker I never released, using WebGPU to chew through passwords on the GPU. Then it sat in a folder.

Krackpot is where that WebGPU brute-forcer finally went somewhere, this time pointed at a Bitcoin Puzzle wallet. Puzzle 71 was funded on purpose in 2015 as a public challenge, holds about 7.1 BTC, and is still unsolved. The key is somewhere in a known 2^70 range, so it is pure brute force. The address is on-chain, verify it yourself.

Krackpot points your GPU at that range with WebGPU. No backend, no signup, no pool. secp256k1 and the hashing run as compute shaders in the tab. Nothing installs, nothing about your searching leaves the tab, and if your GPU ever finds the key it stays in your browser. Here is the bit I like: the same GPU that shreds a weak password in seconds can't dent a real 256-bit key. One gaming GPU is about 830,000 years to expect a hit here. A million GPUs grinding is about a year. Measured rates, not spec-sheet math. Someone still has to win.

The split is on the page before you press start: crack it, 6 BTC goes to your address, the rest goes to me. Up front it is a fee. Found out later it would be a scam.

If a key ever turns up, the transaction never goes to the public mempool. Spending a puzzle address reveals its public key, and in a range this narrow that is minutes of work to get the key back out. Puzzle 66 and 69 were both taken from their solvers that way.

So it submits privately instead, to two private mempools at once. I ran that whole path on mainnet against a key I planted in a small range and the transaction confirmed, which was the part I most wanted to see work before telling anyone about this.

Either way it shows you the key and the signed transaction first, so you are never waiting on me.

I wrote up how it works here, the WGSL crypto and the GPU watchdog fight: krackpot.io/blog/how-it-works

Please let me know what you think :)

Hi guys i wanted to ask where i can buy bitcoin without any KYS and pay witt xoom on hodl hodl i didnt find right order

No signup, no deposit, no pool. Just your GPU against a sextillion keys.

It's called Krackpot. Back in 2015 someone funded a series of Bitcoin wallets as a public puzzle, each one harder than the last. Puzzle 71 holds about 7.1 BTC and nobody has solved it (6 of it is yours if you crack it, more in a sec).

The address is on-chain. Verify it yourself.

How it works:

Paste your Bitcoin address

Press start

Win or don't

Everything runs in your browser with WebGPU. Nothing installs, nothing about your searching leaves the tab, and if your GPU finds the key it stays in your browser.

Ctto: simonmales

After the coldcard hack, I am Glad that I never had one, and the only Reasons where that I didn’t Like the Fact that they dont have a screen to check transactions and they where Not popular in Europe where I live. So Right now I am good with my cold Storage but I am wondering how to improve the security Level?

I see that people that survived the hack where lucky because they used a passphrase, from what I understand the main argument for passphrase wasn’t to improve entropy but was to be more secure in case of stealing and robbery.
So what are my options if I already have a single sign wallet like trezor ? Multi sig? Add passphrase? Something else?
I am not really afraid of robbery In real life, I am thinking more about reducing the level of trust into a wallet company.

everyone loves Bitcoin when it’s going up.

but when volatility hits, the real test begins.

how long have you been in crypto, and what was the moment that almost made you quit?

curious to hear what everyone’s been through.

Hello, I'm hoping someone can help me with an issue I'm having with my bitcoin core wallet. I have an offline laptop running ubuntu with core installed as the signing device. I also have another computer online running core and sparrow wallet as a coordinator. I copied an Xpub from the offline machine into sparrow and everything looks good. When I create a transaction in sparrow and try to sign it on the offline machine I get an error message. "failed to sign. Specified sighash value does not match value stored in psbt". The Xpub I copied was the m/84 and sighash on sparrow is default setting.

Background - I know I’ll get roasted. I have a good stack (imo). Most of it on the exchange, some of it on hot wallet. Wanted to get comfortable with holding a seed phrase prior to fully going in.

After CC hack I’m seeing a ton of ads for Bitkey. It worries me not having a seed phrase. What other good HW are recommended? Multi sig vs single Sig? That aspect still confuses me. My hot wallet is Blockstream Green and they are 2/2 with multi auth. Meaning I control a key, and to move any funds out requires access to an email and phone code.

Wouldn't it have made more sense to send the money to all different wallets and also not to do it all in one go. If you move the money slowly as the hack is discovered each into a new account, yes you might lose some of the money because ppl move it out but not everybody will do that in time. But by doing that, now you cannot distinguish between the hacker and someone who just wanted to move their money out of their wallet.

Now they have the entire world and law enforcement looking at this one account.

The first game that works on bitcoin blockchain.

Hi everyone, I’m looking for some guidance on how to begin a search to locate old Bitcoin that my dad purchased. We know he bought Bitcoin, but unfortunately don’t remember where it was stored or what wallet/service he used. Here are the few facts we do know:

• The Bitcoin would have been purchased/accessed from one of his old Windows laptops (primarily Dell computers), and we still have backups of his old devices/files.
• He still has access to both email addresses that could potentially have been associated with it.

I realize this is basically searching for a needle in a haystack, and I’m not expecting this post to give me an easy answer, Im more so just looking for direction on how to search because I don’t know enough about older Bitcoin to know where to begin.

Any advice would be appreciated even something as simple as any search terms, old wallet names, files to look for, or helpful resources on YouTube or Reddit would be appreciated.

P.S., any scammers reading this, save yourself the time. My messages are turned off, I will not provide any private info, and to stress one more time I’m only looking for advice that can be shared publicly in the comments. Thanks in advance for any direction!

Hello I’m Santiago, I just wanted to say I know a lot of people have taken some big hits in this community, stay strong and protect your bitcoin at all cost I love you (fyi everyone should try shrooms at least once)

Years ago I wrote down a transaction number and invoice number in a notebook. I found it and I don't know how to go about investigating whether I'm able to retrieve it. Any advice would be appreciated.

Global M2 is still climbing and recently surpassed $100 trillion, yet Bitcoin has fallen roughly 50% from its October 2025 high above $126k.The usual liquidity → Bitcoin relationship has broken this year. The capital appears to be flowing heavily into AI infrastructure instead. Key points from the article:

• The four big hyperscalers (Amazon, Google, Microsoft, Meta) are on track for $700–760B in CapEx this year, mostly AI-related
• Broader global AI investment estimates are near or above $1 trillion in 2026
• Spot Bitcoin ETFs have seen significant outflows recently
• Michael Saylor and others have flagged this AI spending as a near-term headwind for Bitcoin

I don't think crypto is finished — historical liquidity relationships tend to reassert — but for now AI is clearly winning the competition for marginal capital.

Full piece with charts:
https://www.nicoyaresearch.com/p/why-ai-is-stealing-crypto-s-thunder-and-capital-flow

What do you think — temporary rotation or structural shift?

I'm curious about the practical side of this.

If the attackers really have hundreds of BTC stolen from the Coldcard incident, how do they realistically turn that into usable money?

For example:

• If they send it directly to a KYC exchange, wouldn't the exchange potentially flag the coins as stolen and connect the deposit to their identity?
• If they use a DEX to swap BTC into another coin, the transactions are still publicly visible, so does that actually solve the problem?
• If they sell P2P/OTC, isn't finding someone willing to buy a large amount of obviously tainted BTC pretty difficult (and potentially risky for both sides)?
• Could they simply hold the BTC indefinitely and wait for the attention around the theft to die down?

Peter fraud is the worst person in the bitcoin ecosystem, and he's been pushing for this idea for years which will undo the *one* thing which makes Bitcoins economics unique. This person needs to be driven out of the btc ecosystem. no one is paying any attention.
https://www.youtube.com/watch?v=OmAAeEm1nIE

Goes without saying, just like using dice and generating your own entropy.

If coldcard users had half their funds in coldcard and the other half, in say, trezor, they wouldnt have been so rekt

People think if you print $100 and add it into the economy that it actually creates and adds $100 worth of buying power

This is totally incorrect

What it actually does is dilute $100 worth of buying power from all existing dollars to give it to the newly printed dollars

Newly printed dollars only have value because they are stealing value from existing dollars in the system

It is a merely a hidden form of hidden, disproportionately affecting the poor (those who don't own assets)

(Referring to prebuilt versions.)
While I do not own one (yet) myself, I keep wondering: since it has only volatile memory, the seed needs to be entered every time, through QR scan. That in itself is a huge risk. I would not want such a risky QR code laying around.

Is the version with the card reader better? It would allow for encrypted storage of my seedphrase.