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Quantum Computing Threat Looms Over Bitcoin

Nathan Brooks 22.05.2026

A Looming Threat to Dormant Wallets

Citi researchers have warned that Bitcoin is more vulnerable to quantum computing attacks than Ethereum due to its governance structure. Recent advancements in quantum computing have brought the threat timeline forward to 2030-2032. Both cryptocurrencies face a potential threat from quantum computers.

The researchers highlighted that Bitcoin's exposure stems from its governance model, which makes it challenging to achieve the necessary consensus to address the issue. Ethereum, on the other hand, has a more adaptable governance structure.

An estimated 6.7-7 million Bitcoin in dormant wallets are already at risk because their public keys are exposed. If a quantum computer were to access these wallets, the funds could be stolen. This vulnerability is a significant concern for Bitcoin investors and users.

Can Bitcoin Survive a Quantum Attack?

The researchers' warning raises questions about the ability of Bitcoin to withstand a quantum computing attack. The cryptocurrency's decentralized nature and lack of a central authority make it difficult to implement changes to its protocol.

The potential consequences of a quantum computing attack on Bitcoin are severe. If the cryptocurrency is unable to adapt to the threat, it could lead to a loss of investor confidence and a decline in its value. As quantum computing continues to advance, it remains to be seen how Bitcoin and other cryptocurrencies will respond to the challenge.

Frequently Asked Questions

Q: What is the estimated timeline for a quantum computing attack on Bitcoin? A: Citi researchers estimate that the threat timeline has been revised to 2030-2032. This is due to recent advancements in quantum computing.

Q: Why is Bitcoin more vulnerable to quantum computing attacks than Ethereum? A: Bitcoin's governance structure makes it challenging to achieve the necessary consensus to address the issue, making it more exposed.

Q: How many Bitcoin are at risk due to exposed public keys?

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