Bitcoin and Ethereum Take Different Paths to Post-Quantum Wallets

Bitcoin and Ethereum are approaching post-quantum security differently, reflecting their distinct wallet designs and upgrade processes. Both ecosystems face the need to protect funds from future quantum attacks, but neither has a simple, immediate migration path. For Bitcoin, the key challenge is enabling users to move coins to quantum-resistant addresses without disrupting the network or leaving dormant funds exposed; Ethereum’s approach can leverage its more flexible account and protocol mechanisms. These plans are precautionary, not evidence that current quantum computers can break Bitcoin’s cryptography.