CoinDesk’s latest Bitcoin quantum-risk report moves the debate away from a familiar question: whether old wallets with exposed public keys could be stolen from once large quantum computers exist.

The newer risk surface

Andrew Gault, CEO of ZeroTier and founding partner at 7percent Ventures, told CoinDesk that the more urgent concern may be financial data already moving across networks. His argument is that payment authentication messages, exchange API traffic, bridge proofs, and custody signing workflows can be stored today and attacked later if quantum hardware becomes capable enough.

That is the same broad threat model known as “harvest now, decrypt later.” It does not require an attacker to break Bitcoin today. It requires collecting encrypted or signed traffic now, then waiting for cryptographic assumptions to age badly.

Why it matters

Google has already accelerated its own post-quantum cryptography migration target to 2029, citing progress in quantum hardware and resource estimates. Separately, a Google Quantum AI cryptocurrency whitepaper modeled attacks against elliptic-curve systems used by Bitcoin and other chains, including scenarios where an exposed public key becomes a live target during settlement.

The conservative takeaway is not that Bitcoin is immediately broken. Current public quantum machines are still far from the required scale. The point is that crypto infrastructure has more to migrate than wallets: exchanges, custodians, bridges, and settlement systems also need quantum-safe authentication paths before archived traffic becomes useful to attackers.