Assessing the Quantum Threat to Bitcoin w/ Shinobi

Quantum computing is not an immediate threat to Bitcoin, as machines capable of breaking the elliptic-curve cryptography protecting exposed public keys do not currently exist. The primary long-term risk is to coins whose public keys have been revealed, particularly through address reuse or spending, while funds in unused addresses remain better protected until a transaction exposes the key. Bitcoin would likely have time to adopt post-quantum cryptography through a protocol upgrade, but doing so would require broad community coordination and could create significant migration, governance, and consensus challenges.