Bitcoin has been struggling to hold ground for months. Now, it has a new problem to deal with, one that involves quantum computers, Elon Musk, and a deadline that suddenly feels a lot closer than it used to.
Bitcoin’s price slipped back below $70,000 this week, adding to a painful run that began when Bitcoin peaked near $126,000 last October. The immediate pressure came from a familiar source, macro anxiety and the ongoing US-Iran conflict, but fresh fears around quantum computing have layered on top of everything else, sending a new kind of chill through the market.
The story starts with Google’s Quantum AI team, which published a paper earlier this week warning that the computing resources required to break the encryption protecting Bitcoin and Ethereum wallets may be as much as 20 times lower than previously estimated.
Google’s vice president of security engineering followed that up with a blog post announcing a firm deadline that reveals that the company is targeting 2029 for completing its own migration to post-quantum cryptography, a new generation of encryption designed to withstand quantum-level attacks.
That paper, which was covered earlier this week, landed quietly in technical circles at first. Then Elon Musk made it a trending conversation.
What Musk actually said
Musk shared a post on X summarizing Google’s research in blunt terms. Venture capitalist Max Reiff had written: “Basically saying: ‘We’ve cut the quantum resources needed to break bitcoin’s encryption by 20x. We can now break it. We can prove it. We’re just not going to tell you how. We’ve slowed down research to give crypto a chance. You have until 2029 to figure out a solution. Good luck.'”
Musk reposted it alongside a conversation with his Grok AI chatbot in which post-quantum migration for cryptocurrencies was described as “urgent now.” He added his own wry comment: “On the plus side, if you forgot the password to your wallet, it will be accessible in the future.”
It was classic Musk darkly humorous on the surface but carrying a signal that the people who pay attention to what he amplifies couldn’t ignore. Analysis from Project Eleven, a security group focused on quantum risk to Bitcoin, estimates that around 7 million Bitcoin, worth approximately $470 billion at recent prices, are potentially vulnerable to quantum attack.
These are coins held in address types that expose the public key, giving a sufficiently powerful quantum computer a mathematical route to deriving the private key and spending the funds.
BlackRock, separately, has issued its own caution around crypto market risks tied to quantum computing developments, adding institutional weight to what has largely been a technical conversation.
The satoshi coins question
One thread that’s surfaced alongside the quantum debate is what happens to the roughly 1 million Bitcoin widely believed to have been mined by Satoshi Nakamoto, the anonymous creator of Bitcoin, if quantum computers become capable enough to crack early wallet encryption.
Binance founder Changpeng Zhao, known as CZ, raised the point directly. “If those coins move, then it means he/she is still around, which is interesting to know,” CZ wrote on X. “If they don’t move in a certain period of time, it might be better to lock those addresses so that they don’t go to the first hacker who cracks it.”
CZ’s broader take was measured. He acknowledged the threat is real but argued it’s manageable through protocol upgrades. “At a high level, all crypto has to do is upgrade,” he wrote. “No need to panic.”
That view has support, though not everyone is quite so relaxed about the timeline. Chris Tam, president of BTQ Technologies, a company focused on quantum-secure software, called Google’s paper “the clearest signal yet that cryptographically relevant quantum computing is approaching faster than many expected.”
Venture capitalist Nic Carter went further, comparing the stakes of the quantum threat to the Manhattan Project, the classified US program that produced the atomic bomb. “It’s of similar stakes for sure,” he said.
2029 is closer than it sounds
The nuance here is something important. No quantum computer exists today that can crack Bitcoin’s encryption. The threat is real but timeline-dependent. Google’s updated estimates have tightened that window considerably, and 2029, which once felt like a comfortable abstraction, is now three years away.
The crypto industry has known this migration needed to happen. The question has always been whether it would happen fast enough. Google’s paper, amplified by Musk to his 200 million-plus followers, appears to have moved that urgency from a technical discussion to a market-moving conversation. Whether that’s a reason to sell Bitcoin today is debatable. Whether the industry has enough time to prepare is the question that actually matters.