BTC Sessions said its team spent several weeks helping Bitcoin holders affected by a Coldcard vulnerability transfer their funds to safer storage, protecting an estimated tens of millions of dollars in Bitcoin. The effort came too late for many users: one member of the local Bitcoin community lost 90% of his holdings, while another woman BTC Sessions spoke with lost all of her Bitcoin. BTC Sessions described the episode as potentially the most serious self-custody incident in Bitcoin history. The experience prompted a reassessment of asset custody, with diversified security measures emerging as a key lesson.