Google researchers warn that advances in quantum computing could endanger the cryptographic systems securing cryptocurrencies and much of today’s digital infrastructure sooner than previously expected. New findings show that quantum computers may require fewer resources to break elliptic curve cryptography, a key security protocol used in blockchains and internet infrastructure, raising the urgency around quantum threats. If large-scale quantum computers become operational (“Q-Day”), encrypted financial data and digital identities could be vulnerable. Google urges transitioning to post-quantum cryptography (PQC), rotating keys, and limiting public key exposure as mitigation strategies. Experts assess that, while the risk is increasing, a cryptographically-relevant quantum computer before 2030 remains unlikely but possible. Bitcoin security researcher Justin Drake estimates a 10% chance such a quantum computer could break Bitcoin keys by 2032. Industry analysts emphasize that quantum computing is a long-term engineering challenge, not an immediate existential threat, and preparations are already underway. The broader implication is that quantum advances would require a significant upgrade across the entire internet’s security systems, emphasizing the need for proactive planning.