The rise of quantum computing poses a significant yet surmountable threat to Bitcoin, as highlighted by Wall Street broker Bernstein, due to recent advancements that compress the timeline for potential attacks on modern cryptography. Although the broker acknowledges that breakthroughs, such as Google Quantum AI's reduction in qubit requirements, indicate the risk is no longer a distant concern, scaling quantum systems to break widely used encryption remains a complex challenge. Analysts at Bernstein, led by Gautam Chhugani, emphasize that quantum computing should be viewed as a medium to long-term system upgrade cycle rather than an immediate risk.
Quantum computing leverages quantum mechanics, utilizing qubits that can exist in multiple states simultaneously, allowing for the simultaneous processing of numerous possibilities. When combined with entanglement, this enables quantum systems to solve specific problems, such as breaking encryption, more efficiently than classical computers. However, the report notes that the threat of quantum computing spans multiple industries, from finance to defense, and should be perceived as a manageable, long-term risk rather than an existential one for Bitcoin. Approximately 1.7 million BTC held in older wallets are exposed, while newer practices and protocols reduce vulnerability.
Moreover, Bitcoin mining, which relies on SHA-based hashing, remains secure even in advanced quantum scenarios, according to the broker. Bernstein anticipates the crypto industry will have sufficient time, around three to five years, to transition toward post-quantum cryptography, with upgrades such as new wallet standards and key rotation already under discussion.