Crypto companies are accelerating efforts to secure wallets and custody solutions against potential quantum computing threats, aiming to upgrade user-facing infrastructure faster than blockchains can adapt their core protocols. Network-level blockchain upgrades may take years, potentially leaving wallets exposed, especially as “Q-Day”—when quantum computers could break current cryptography—may arrive as soon as 2030. Silence Laboratories is integrating post-quantum security in crypto wallets, using NIST-selected algorithms for distributed (multi-party computation, MPC) signatures. Their approach preserves the typical MPC structure used by custodians by splitting private keys across devices, making post-quantum upgrades possible via code changes without architectural overhauls. This allows institutions to migrate seamlessly to quantum-resistant wallets, maintaining user experience. Other developers propose adding quantum-resistant signatures or upgrading Bitcoin's cryptography via smart contract layers, but these methods can be complex or costly. Although the timing of quantum threats is uncertain, the industry is split: some prioritize wallet-level protections, while others insist protocol-level changes are ultimately necessary, as wallet-only upgrades have limitations if blockchains themselves remain vulnerable.