Coinbase's Quantum Advisory Committee has issued a report urging blockchain developers to start preparing for quantum-resistant migration immediately. The report highlights the vulnerability of approximately 7 million Bitcoins to potential future quantum attacks due to public key exposure and address reuse. Although no quantum computer currently exists that can break blockchain encryption, the emergence of such technology by 2030 is considered likely. The report suggests three strategies for handling tokens not migrated to quantum-safe addresses: freezing or destroying them after a deadline, allowing users to decide independently, or implementing a compromise such as limiting the number of vulnerable tokens moved per block. Meanwhile, the Ethereum Foundation and the Stellar Development Foundation have both initiated efforts to transition to quantum-safe cryptography, with Vitalik Buterin outlining a roadmap for Ethereum's quantum upgrade earlier this year.