David Chaum, the godfather of the cryptocurrency and the founder of the first digital currency (Digicash), said in his talk about "Google Quantum Computer Progress": "Google's news of quantum superiority has strengthened my belief that quantum computing is coming soon. Therefore, I think we should all use anti-quantum methods.” Chaum said Bitcoin still has time before quantum computers pose a real threat to their password integrity. In addition, Chaum himself is advancing his own project, which is an anti-quantum signature blockchain that protects users from any metadata leakage. Chaum claims that its project white paper will be open to the public by the end of the year.