Recently, the Bitcoin community has been discussing a very interesting question: Will quantum computers really threaten Bitcoin? This is not science fiction, but a real technical debate.



At this year's Bitcoin conference, experts argued fiercely on this topic. Supporters believe that once quantum computers are developed, using quantum mechanics principles to run Shor's algorithm could break the elliptic curve discrete logarithm problem that Bitcoin relies on. Simply put, if an attacker obtains your public key, they can derive the private key, forge signatures, and this would completely destroy Bitcoin's ownership concept.

However, skeptics say that so far there is no evidence that humans can create cryptographically meaningful quantum computers. Many of the so-called "quantum breakthroughs" in the past have been exaggerated. Still, some physicists warn that quantum computers could be realized within 10 years, causing significant division within the community.

Interestingly, the Bitcoin community is not sitting idly by. Technicians have proposed ideas like BIP 360, which allows users to pre-submit future post-quantum cryptographic script paths on existing encryption infrastructure, effectively reserving space for a technological transition. Although there is currently no fully post-quantum cryptographic algorithm to replace secp256k1, and post-quantum signatures tend to be 100 times larger in data size and require 10 times more verification effort, ongoing technological research is seen as necessary insurance.

This raises another core issue: what about Satoshi Nakamoto’s 1.1 million Bitcoins? According to statistics, about 6.9 million Bitcoins (35% of the total supply) are exposed to risk, mainly those using old P2PK formats or addresses that have been reused, where the public key is directly exposed.

The community has different opinions on this. Some insist that private property rights should not be infringed upon, and that arbitrarily changing the protocol to restrict certain addresses would break Bitcoin’s social contract. Others advocate for hard forks or freezing measures to prevent quantum attackers from dumping large amounts of tokens suddenly, causing market crashes. Still, some propose a compromise called the "Hourglass Plan," limiting the amount of Bitcoin that can be transferred per block, forcing funds to flow out slowly. Currently, the consensus seems to lean toward respecting the original rules.

But there’s an interesting economic perspective here. Even if quantum computers are developed, the initial operational costs are extremely high—each attempt to crack a private key could cost over $50,000. This means small accounts will remain absolutely safe for a long time; early quantum attacks would likely target exchanges or large institutional holdings. As more institutional investors enter Bitcoin governance, risk management becomes even more critical.

Ultimately, Bitcoin’s core value lies in its resistance to change. In the short term, FUD might suppress prices, but this pressure also drives continuous technological evolution of Bitcoin. The future depends on evidence-based and rational decision-making, activating appropriate defenses at the right time to ensure holders can transition smoothly.
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