A Coldcard firmware flaw let hackers drain $70 million in Bitcoin in 41 minutes, with losses now topping $88 million

A flaw in Coldcard's firmware has put the spotlight on a basic part of wallet security: how the device generates its seed in the first place. The issue came into focus after an attacker drained 1,196 Bitcoin addresses on July 30 in a 41-minute stretch, taking 1,082.65 BTC worth about...