DMM Bitcoin loses 4,502.9 BTC

On May 31, 2024, DMM Bitcoin loses 4,502.9 BTC. Japanese exchange DMM Bitcoin reports an unauthorized outflow of 4,502.9 BTC.

DMM Bitcoin reported an unauthorized outflow of 4,502.9 BTC and restricted services while investigating. Japanese regulators sought explanations, and the company said customer Bitcoin deposits would be fully guaranteed.

The event preserves a concrete part of Bitcoin's security history and the operational assumptions users, wallet developers, exchanges or node operators had to manage at the time.