A new report from blockchain analytics company Glassnode has sent ripples through the crypto community. According to their latest data, over 6.26 million BTC (roughly $500 billion at current prices) are stored in wallets whose keys are publicly visible on the blockchain. That figure represents 31.2% of Bitcoin’s total supply, and it is growing fast.
The timing could not be more concerning. This alarming trend is happening at the same moment that fears about artificial intelligence cracking modern cryptography are sweeping across markets. Together, they form what might be the biggest long-term threat Bitcoin has ever faced.
What Did Glassnode Actually Find?
Glassnode, a well-respected onchain analytics firm, recently published findings showing that a large share of Bitcoin’s supply is sitting in addresses that have already exposed their public keys. Think of a public key like a mailbox slot. It is part of how Bitcoin works, and normally, your slot stays hidden until you actually send funds. Once it is visible, however, a powerful enough computer could theoretically use that information to figure out the private key that controls your funds.
Right now, no computer on Earth can do this. But the rise of advanced quantum systems, especially those powered by AI, is changing that conversation quickly.
The Scale of the Problem
Here are the key numbers from Glassnode’s research:
- 6.26 million BTC is held in addresses with visible public keys
- This equals 31.2% of the total Bitcoin supply
- The amount is trending upward at a fast pace
- Much of this includes very old Bitcoin, such as coins mined in the early days by Satoshi-era miners
To put that $500 billion figure another way, that is more money than the GDP of most countries, all sitting behind a digital lock that AI may one day learn how to pick.
Why Are Public Keys a Problem?
To understand the risk, it helps to know a little about how Bitcoin security works. Bitcoin uses a type of math called elliptic curve cryptography. Without getting too technical, it works in a one-way direction. It is easy to generate a public key from a private key, but practically impossible to reverse the process with today’s computers.
However, a sufficiently powerful quantum computer could theoretically run through the math in reverse. If that happens, every public key visible onchain becomes a potential target. And once a private key is exposed, anyone holding that key can move the funds. There is no undo button and no customer support line to call.
The AI and Quantum Connection
Quantum computing has been a theoretical worry for years, but the new concern is how artificial intelligence could accelerate the timeline. AI systems are incredibly good at finding patterns, optimizing calculations, and solving complex mathematical problems.
While today’s AI cannot break Bitcoin’s encryption, researchers are exploring how future AI, combined with quantum hardware, might drastically shorten the time needed to crack cryptographic puzzles. Some experts previously thought this threat was decades away, but recent breakthroughs are making people reconsider that timeline.
Who Is Most at Risk?
The Bitcoin sitting in these exposed wallets is not just from random users. It includes:
- Early miner rewards from Bitcoin’s first years
- Lost wallets whose owners may no longer be alive or have lost access
- Long-term holders who have not moved their coins in over a decade
Ironically, the very coins that prove Bitcoin’s early history, like the first blocks mined by pseudonymous creator Satoshi Nakamoto, are among those most exposed.
What Can Bitcoin Holders Do Right Now?
The good news is that the risk is not immediate. Quantum computers capable of breaking Bitcoin’s cryptography do not exist yet. However, smart holders are starting to take precautions, including:
- Moving funds to addresses that have never spent Bitcoin before, since these addresses still hide their public keys
- Using hardware wallets for cold storage, such as the highly trusted Ledger devices, which keep private keys offline and away from any internet-connected threat
- Following official Bitcoin Improvement Proposals (BIPs) that may eventually introduce quantum-resistant address formats
- Avoiding address reuse, which is one of the easiest ways to keep public keys hidden
For anyone buying or selling Bitcoin regularly, using a secure exchange like Kraken or Bitvavo ensures funds are managed with strong custodial security while you stay active in the market.
Could Bitcoin Upgrade to Be Quantum-Resistant?
Yes, and many developers are already thinking about it. The Bitcoin community could, in theory, roll out a soft fork (a backwards-compatible upgrade) or hard fork (a more aggressive update) that introduces new address types resistant to quantum attacks. The challenge is coordination. Bitcoin is decentralized, meaning thousands of node operators, miners, and developers around the world would all need to agree.
Some proposals include a deadline after which old, vulnerable coins would be frozen unless moved to a quantum-safe address. While controversial, it is one option on the table.
Final Thoughts: Should You Be Worried?
Right now, no. The quantum threat is still largely theoretical, and Bitcoin has years, likely more than a decade, before any real-world quantum attack becomes plausible. But the fact that 31.2% of supply sits in exposed addresses is a wake-up call.
If you are a long-term Bitcoin holder, the best thing you can do today is simple: use a fresh address for every transaction, avoid reusing old wallets, and store your holdings in secure cold storage. These small habits could make a huge difference if quantum computing advances faster than expected.
Bitcoin’s biggest strength has always been its ability to adapt. With the right awareness and preparation, holders can stay ahead of the curve, even as the AI and quantum era approaches.
