Bitcoin Faces Quantum Risk As Bernstein Sees 3–5 Year Window For Upgrades

AI Briefing

• – Bitcoin faces a 3-5 year window to prepare for quantum upgrades due to 1.7 million BTC in early address types being vulnerable to quantum attacks.
• – The threat is concentrated in older wallets and addresses that reuse public keys, with newer wallet practices reducing exposure.
• – Bitcoin's SHA-256 mining process is not seen as meaningfully vulnerable to quantum attacks, with a 10-year timeline for relevant quantum computers.