Bitcoin Devs Integrate Quantum-Resistant BIP360 as 6.51 Million BTC in Legacy Addresses Face Risk

Bitcoin developers have integrated BIP360 into the official BIP repository, adding a quantum-resistant address format called PaytoMerkleRoot (P2MR), according to the summary. About 6.51 million BTC, or roughly 33% of total supply, are held in addresses vulnerable to quantum threats, including an estimated 1 million BTC attributed to Satoshi Nakamoto in early P2PK addresses with exposed public keys. A separate proposal coauthored by Jameson Lopp would freeze coins in legacy addresses that do not migrate to quantum-safe formats by a specified deadline, triggering heated discussion within the Bitcoin community, the summary notes.