PANews reported on June 12th that, according to Decrypt, Coinbase's Quantum Advisory Committee released a report urging blockchain developers to immediately begin preparations for quantum migration resistance, warning that unresolved issues with obsolete and vulnerable tokens could become one of Bitcoin's biggest challenges. The report estimates that approximately 7 million Bitcoins are vulnerable to future quantum attacks due to public key exposure and address reuse. While no quantum computer can currently break blockchain encryption, the possibility of such a computer emerging as early as 2030 is high.

The report proposes three options for handling tokens that have not been migrated to quantum-safe addresses: permanently freeze or destroy them after a deadline; do nothing and let users decide; or take a compromise, such as limiting the number of vulnerable tokens that can be moved per block, or allowing users to pre-commit to migration. The Ethereum Foundation has established a team to coordinate the post-quantum-safe transition, and Vitalik Buterin outlined a quantum upgrade roadmap in February. The Stellar Development Foundation released a roadmap for users migrating to quantum-safe cryptography on Tuesday.