A hack targeting Coldcard wallets triggered a 233k BTC outflow from long-term holders, representing a 1.38% decline in supply.
A security breach involving Coldcard hardware wallets led to the movement of approximately $15 billion in Bitcoin, as long-term holders reacted to the incident. Onchain data shows 2.1k BTC was stolen, while 22k BTC was transferred to exchanges and 233k BTC exited long-term holder wallets between August 7 and August 9, 2026.
The 233k BTC outflow marks a 1.38% drop from the recent all-time high in long-term holder supply. Analysts are assessing whether the emergency migration of coins has distorted key onchain metrics used to evaluate Bitcoin’s market trends.
The incident underscores the risks associated with self-custody solutions and their impact on Bitcoin’s supply dynamics during security threats.