According to CoinMarketCap, Casa co-founder Jameson Lopp said upgrading the Bitcoin protocol to meet post-quantum security standards may take at least 5–10 years due to the network’s decentralized consensus model, setting a multi-year horizon for any quantum-resistant cryptography transition in BTC’s base layer, source: CoinMarketCap citing Jameson Lopp on X, Dec 22, 2025.