210,000 Bitcoin Left Long-Term Holder Wallets. Roughly 210,000 BTC left long-term holder wallets over the past week, according to Glassnode data via Coindesk, pushing the cohort’s total supply down from just under 15 million BTC to about 14.7 million. The breach, which stemmed from a weak random-number flaw in Coldcard firmware dating to 2021 and was exploited from late July, has triggered the largest Bitcoin migration since FTX, and almost none of it is profit-taking. After the breach, Coldcard advised affected users to generate entirely new wallets and move their Bitcoin immediately, and holders did, at scale. A 210,000 BTC exit from long-term wallets that was genuine selling would have hit the market hard.