594 BTC drained in 25 minutes as Coldcard flaw sparks alarm

Coinkite has warned owners of its Coldcard Mk3 hardware wallet that any Bitcoin seed generated since March 2021 may be vulnerable after discovering a flaw that could make those seeds predictable. The warning came the same day about 594 BTC—worth roughly $38 million—was drained from around 500 wallets. Users who purchased Coldcard primarily for its...