According to CoinMeta, Ledger Chief Technology Officer Charles Guillemet stated that Bitcoin currently does not face an imminent quantum computing problem; the real challenge is how to complete a post-quantum migration that may last for several years. He believes that Shrincs is one of the more serious dedicated post-quantum signature schemes for Bitcoin at present. It is based on SHA-256 and combines stateful signature paths with stateless backup options. Shrincs will bring new state management risks to the wallet ecosystem; if one-time signature slots are reused, it could lead to fund theft. Additionally, some of the existing BIP32 derived and threshold signature capabilities will also be difficult to retain directly. Compared to choosing a signature algorithm, how to upgrade wallets, migrate existing BTC, and deal with coins that have not been moved for a long time may be even more difficult issues.