The Coldcard firmware exploit drained approximately 2,100 BTC, with losses estimated near $130 million across three confirmed attack waves. In parallel, 233,000 BTC, worth approximately $15 billion at current prices, moved out of long-term holder wallets to safety, according to onchain data from Checkonchain. Casa CEO Nick Neuman says some of those funds came from Ledger and Trezor users—not just Coldcard owners—who migrated to multisig solutions after watching the hack unfold. Long-term holder Bitcoin supply dropped by 1.38%, marking the largest weekly decline since December 2024, falling from nearly 15 million to approximately 14.7 million BTC. Coinkite, the Canadian manufacturer of Coldcard, urged all users who generated a seed with firmware versions 4.0.1 through 4.1.9 to treat their wallets as compromised and migrate to a new seed immediately.
Source: Read the original article
