How the $89M Cold Wallet Hack Reconstructed Bitcoin Seed Phrases

How nearly $89 million in Bitcoin was reportedly stolen

Why more than 4,500 addresses may have been affected

How weak randomness can expose a recovery phrase

How attackers can test possible seeds against the blockchain

Why the physical wallet never needed to be touched

Whether Coldcard and its security reviewers should have found the defect

Which devices and firmware versions may be vulnerable

What affected owners should do immediately