Bitcoin active addresses hit approximately 980,000 on July 31, 2026, the highest reading since December 2024. This surge was not driven by investor enthusiasm but by a panic migration following the disclosure of a critical flaw in Coldcard Mk3 hardware wallet firmware released in March 2021. Coordinated attacks targeted between 4,585 and 7,300 addresses, resulting in confirmed losses of 1,367 to 1,596 BTC, translating to roughly $89 million to over $100 million. If follow-on attack waves continue, total losses could exceed 2,000 BTC, approximately $130 million.
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