What if a quarter of the bitcoins in circulation were at risk of being stolen due to a cryptographic flaw? This scenario, now taken seriously, is prompting Jameson Lopp and other developers to propose an unprecedented measure: to freeze the BTC stored on addresses vulnerable to quantum attacks. Among them, the legendary funds of Satoshi Nakamoto. This is an explosive initiative, balancing the need for security and a questioning of the founding principles of the protocol.