Coldcard Exploit Drains $89M Across 4,500 Bitcoin Addresses
A cryptographic vulnerability in Coldcard hardware wallets has been systematically exploited across at least three distinct attack waves, resulting in $89 million in confirmed losses from 4,500 compromised addresses. The attacker has progressively expanded targeting to smaller balances, triggering a measurable shift in on-chain behaviour as retail holders move funds to centralised exchanges. For CFD traders, the episode introduces a new volatility vector and reinforces the importance of monitoring exchange inflow data as a sentiment proxy.