The emergence of quantum computing poses a significant yet controllable threat to Bitcoin and the broader cryptocurrency ecosystem, as recent breakthroughs shorten the timeline for potential attacks on modern cryptography, Wall Street broker Bernstein has stated. Notably, advancements such as Google Quantum AI's reduction in qubit requirements indicate that the risk is no longer a distant concern, but rather a medium to long-term system upgrade cycle.
Analysts, led by Gautam Chhugani, emphasized that quantum computing should be viewed as a manageable, long-term risk rather than an existential one for Bitcoin. Quantum computing operates on the principles of quantum mechanics, utilizing qubits that can exist in multiple states simultaneously, allowing for the simultaneous processing of numerous possibilities. When combined with entanglement, quantum systems can solve specific problems, such as breaking encryption, far more efficiently than classical computers. However, the report highlights that the threat posed by quantum computing spans multiple industries, from finance to defense, and should be addressed as a manageable, long-term risk.
Approximately 1.7 million BTC held in older, legacy 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. Bernstein expects the crypto industry to have sufficient time, around three to five years, to transition toward post-quantum cryptography, with upgrades such as new wallet standards, reduced address reuse, and key rotation already under discussion.