An expert this week claimed that roughly 1.1 million bitcoin believed to belong to Satoshi Nakamoto — plus millions more in other dormant wallets — can still be saved from a future quantum attack. The solution? A soft fork that would freeze the vulnerable coins and layer on quantum-resistant protections, according to researchers at a privacy-centric blockchain startup.
Why dormant BTC is at risk
Bitcoin's oldest addresses use ECDSA signatures, a pre-quantum standard. If a sufficiently powerful quantum computer emerges, the owner of that machine could derive private keys from public ones — and drain coins that haven't moved since the network's early days. The expert argues that the community has a window to act before that threat becomes real.
The proposed defense
Researchers at the startup are pitching a multi-layer quantum defense. The first layer would freeze any bitcoin that has been dormant for more than a decade, effectively locking Satoshi-era coins and other ancient UTXOs from being spent. The second layer would deploy post-quantum signature schemes on top of that frozen set, letting legitimate owners prove ownership through a new cryptographic path.
A soft fork, not a hard one
The plan hinges on a soft fork — a backward-compatible change that doesn't split the chain. That's a deliberate choice. Hard forks have fractured the community before, and the researchers want to avoid repeating that fight. The soft fork would activate only on coins that haven't moved in a set threshold of years, meaning active wallets wouldn't notice anything different.
Unanswered questions
The proposal raises obvious problems. How do you prove you're the real owner of a Satoshi-era wallet without the private key? The startup hasn't detailed that step yet. And any attempt to freeze coins will face pushback from purists who argue that Bitcoin's immutability shouldn't be tampered with. The expert acknowledges the debate is coming — but insists the alternative is watching a billion dollars' worth of bitcoin become stealable.
