Could Quantum Memory Break Bitcoin and Launch Quantum Money?

The future of cryptography might hinge on a single piece of hardware that does not quite exist yet. Oxford lecturer Stefano Gogioso argues that portable long term quantum memory will soon become a reality. Until now, quantum money has stayed a theory because scientists could only keep fragile quantum states alive for a few seconds. Gogioso explains that building a stable device is inevitable because fault tolerant quantum computers already require similar technology to keep states alive against noise.

This creates a fascinating dilemma for the crypto industry. The exact same hardware needed to build a fault tolerant quantum computer can also expose Bitcoin signatures. Research from Google Quantum AI and the Ethereum Foundation suggests an attack on Bitcoin needs fewer than 500,000 physical qubits, which relies on the exact same quantum memory development. Therefore, every dollar spent funding quantum computing is simultaneously funding both the destruction of Bitcoin and the creation of its replacement.

While the threat to current cryptography has a clear timeline, with institutions like IBM and the National Institute of Standards and Technology pointing toward the late 2020s and early 2030s, quantum money has no firm launch date. Experts note that practical quantum currency is still a vision for the future. Traders and crypto holders should watch how quantum research progresses, keeping an eye on hardware milestones that could eventually force major security upgrades across the entire digital asset space.