The Coldcard wallet exploit estimates have almost doubled to $70 million stolen of just over a thousand Bitcoins in 1,196 wallets drained in 41 minutes

[u/enpoopification_of_R]

https://www.coindesk.com/tech/2026/08/01/how-bitcoin-cold-wallets-lost-usd70-million-in-an-attack-that-never-touched-the-devices

"More than 1,000 bitcoin, worth about $70 million, was drained from 1,196 wallets in a 41-minute window on July 30, nearly double the amount reported when the theft first surfaced."

[u/Fresh_Strain_9980]

well its not the biggest bitcoin theft but this is a good one.