Fidelity Digital says quantum-proofing Bitcoin is possible but challenging

Fidelity Digital says quantum-proofing Bitcoin is technically feasible but will be difficult and costly. The primary risk is to current signature schemes (ECDSA/Schnorr), which quantum computers could eventually exploit to derive private keys from public keys or signatures, necessitating migration to post-quantum algorithms and protocol changes. That migration is complicated by address reuse, legacy unspent outputs, and the need for broad coordination across wallets, nodes and users, so proactive planning and software updates are required. The implication for Bitcoin is that, while not an immediate existential threat, quantum risk demands early, organized action to prevent large-scale theft or disruptive forks.