Bitcoin mines first quantum-safe mainnet transaction: StarkWare

StarkWare announced it broadcast what it calls the first quantum-safe Bitcoin mainnet transaction using a quantum-resistant signature scheme. The test shows post-quantum signatures can be carried on Bitcoin today and demonstrates a practical migration path for protecting keys and long-term holdings. While it does not imply an immediate quantum threat to Bitcoin, the result highlights the need for standards, wallet support, and coordinated upgrade planning to deploy post-quantum protections at scale.