The U.S. government just set a hard deadline for post-quantum cryptographic migration: 2031 Two executive orders signed in 2025 require all federal agencies to replace classical signature schemes with NIST-standardized post-quantum algorithms. The mandate covers every system that touches federal data. Bitcoin is not on the list. That is exactly the problem. This post breaks down what the threat actually is at the cryptographic level, why the migration is harder than it looks, and what the develo