Quantum Threat: Why Ethereum Outshines Bitcoin in the Race Against Time

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The quantum clock is ticking: it’s <a href="https://tech-oracle.com/btc-usd/">Bitcoin</a>‘s problem, not <a href="https://jpyxx.com/eth-usd/">Ethereum</a>‘sOpinion

If Bitcoin and Ethereum had launched simultaneously, Bitcoin likely wouldn’t be as well-known. I moved all of Bit Digital’s Bitcoin holdings into Ethereum, and we’ve since built one of the largest corporate Ethereum reserves globally. I’ve publicly stated we plan to hold onto it indefinitely. People often ask why I feel so strongly about this, and the reason became clear on March 30, 2026, as recently confirmed by Citi.

A recent report from Citi analysts, released on May 18th, highlights that progress in quantum computing is accelerating the potential threat to digital currencies. Their analysis suggests that Bitcoin is considerably more vulnerable to attacks from quantum computers than Ethereum. This difference isn’t simply due to the underlying technology, but also to how each cryptocurrency is managed and updated.

Recent research from Google Quantum AI, along with Stanford University and the Ethereum Foundation, has revealed that breaking the security of Bitcoin’s cryptography is significantly easier than previously thought – about 20 times easier. Their findings suggest a powerful quantum computer with fewer than 500,000 qubits could potentially crack Bitcoin’s code in around nine minutes. While such a computer doesn’t exist yet, the time to prepare for this threat is shrinking quickly, and many organizations aren’t aware of the urgency. With both Google and Citi highlighting this risk, it’s become a major concern, and it directly threatens Bitcoin’s future.

Why bitcoin is exposed

Bitcoin relies on complex math to keep your transactions secure. When you send bitcoin, a piece of your public identity is temporarily visible on the network. Normally, it’s impossible to use this information to figure out your secret ‘private key’ with regular computers. However, powerful quantum computers, using a specific technique called Shor’s algorithm, could potentially break this security when a transaction is being broadcast. A recent study by Google doesn’t just confirm this possibility – it provides precise details, leaving no doubt about the risk.

Nic Carter, a leading expert at Coin Metrics, has been warning about a potential threat to Bitcoin for months. Starting in October 2025, he wrote that the rise of quantum computing poses the biggest long-term danger to the security of Bitcoin’s underlying code, and criticized developers for not taking the risk seriously enough. Carter believes a powerful quantum computer could crack Bitcoin’s encryption as early as 2028. He estimates that around 6.9 million Bitcoins – over 21% of all transactions in 2025, including older wallets and recent Taproot transactions – could be at risk if that happens.

Bitcoin’s governance problem

You could wonder, why can’t Bitcoin just improve itself? It could, technically. However, that’s where the problems really start to add up.

As a Bitcoin investor, one thing that really strikes me is how slowly changes happen. It’s by design – Bitcoin prioritizes extreme caution and everyone needs to agree before anything major gets implemented. For example, SegWit took almost 8.5 years to fully roll out, and Taproot around 7.5 years. Even now, in 2026, the proposals to protect Bitcoin from quantum computers are still being tested. A full upgrade to quantum-resistant signatures would be the biggest, most difficult change Bitcoin has *ever* faced. What worries me is that many of the core developers don’t seem overly concerned about the urgency of this threat. That’s a real risk, because a major breakthrough in quantum computing won’t wait for everyone to come to an agreement – it could happen quickly and potentially compromise the network. It feels like a serious governance issue for anyone holding a significant amount of Bitcoin.

Ethereum has already acted

Here’s where Ethereum differs significantly. Unlike some projects rushing to address quantum computing threats, Ethereum has a planned and ongoing strategy. This strategy is based on the new post-quantum cryptography standards established by NIST in August 2024.

As an Ethereum investor, I’m really excited about how the network is preparing for the future, specifically the threat of quantum computing. The Pectra upgrade in May 2025 was a big step, introducing a way for accounts to upgrade their security *without* forcing everyone else to change at the same time. Basically, it lets individual accounts choose more advanced, quantum-resistant signature methods if they want. The next major upgrade, Hegotá, planned for late 2026, will build on this even further, making these improvements a core part of how Ethereum works. The Ethereum Foundation is aiming to have all the key infrastructure in place by around 2029, and they’re already testing things out with different network setups. It’s great to see them proactively addressing this long-term challenge.

The difference in how easily Ethereum and Bitcoin can be upgraded is striking. Ethereum was intentionally built to handle major changes like this, something Bitcoin wasn’t designed to do. This wasn’t a coincidence – it’s a fundamental part of Ethereum’s design.

The institutional calculus

As a researcher tracking emerging threats, I’m seeing that the risk of quantum computing breaking current encryption is now very real for those managing large financial portfolios – both in the corporate world and for sovereign wealth funds. It’s moved beyond a hypothetical concern. Governments are actively preparing; for example, U.S. federal agencies had a deadline of April 2026 to outline their plans for switching to quantum-resistant cryptography, as directed by a National Security Memorandum. The EU is aiming for similar protection of critical infrastructure by 2030. We’ve also seen coordinated efforts like the G7 Cyber Expert Group’s financial sector roadmap published earlier this year. Ultimately, this push for compliance will inevitably impact how digital assets are held and managed by treasury departments.

As an analyst, I see the biggest challenge for institutions holding Bitcoin isn’t just its price volatility, but its future-proofing. Specifically, we need to ask if they’re comfortable with an asset where the plans to protect it from quantum computing are still being developed, where changes to the system happen incredibly slowly, and where developers can’t even agree on whether these issues need to be addressed quickly. It’s a complex situation that requires careful consideration.

For any organization thinking about using Ethereum, the key question is whether they prefer an asset that’s actively being improved with a clear and open plan for those upgrades.

I believe Ethereum is a stronger, more versatile, and longer-lasting investment. My confidence comes from a thorough analysis, comparable to reviewing a public company’s financial statement. A recent Google research paper now provides a clear and technically sound answer to a key question for businesses managing digital assets: which one is most likely to remain valuable over time?

Ethereum isn’t flawless – no investment is. However, when considering the potential threat of quantum computing, its design is uniquely positioned to withstand those challenges. If experts like Carter and Google are correct, this advantage could be incredibly significant, and it might happen faster than many realize.

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2026-06-10 19:15