Late-night bombshell! After Circle quietly released its post-quantum roadmap, your $BTC address could be “pre-identified,” and 14 million addresses are already on a death list

Bro, sit tight. Today we discuss a heavily underestimated "slow-motion murder" event by the market.

A giant stablecoin company called Circle released a paper. At first glance, it looks like a technical document, but what I read is: a countdown has started for all cryptocurrency holders.

Core conclusion: if quantum computers become practical, almost all blockchain signature algorithms—ECDSA, Ed25519, BLS—will be as fragile as paper. As long as your account’s public key has been exposed, your $BTC, $ETH could be reverse-engineered to find the private key by a quantum computer.

Even more seriously, this isn’t a “might be bad in the future,” but “past data has already been recorded, waiting for the keys to be ready.”

Specifically, the paper uses Project Eleven’s Bitcoin RisQ Metrics data to directly point out: about 14 million $BTC addresses are currently exposed to quantum risk. Yes, hundreds of thousands. How much balance is in these addresses? No one knows, but the number alone is enough to send chills down anyone’s spine.

Circle’s roadmap is very pragmatic: three steps. The first step is to start supporting post-quantum signatures now (they chose SLH-DSA-SHA2-128s), but not immediately disable old ECDSA, because new signatures are too large and affect throughput. First, enable smart contracts to recognize new lock types, but native transfers still rely on old keys.

The second step is a hybrid transition phase. The biggest headache is the ecrecover issue—many ancient EVM contracts depend on this function for signature verification, and many of these contracts cannot be upgraded. They can either hard fork to change the protocol or leave a huge quantum backdoor. Circle prefers hard forks, but that requires consensus from the entire ecosystem.

The third step is a final hard switch. Once the ecosystem, hardware, and regulators are ready, Circle will reject all ECDSA signatures. If a chain hosting USDC cannot meet post-quantum security standards for a long time, they might even suspend contract functions or withdraw support.

But the real problem isn’t the technology; it’s “what to do with the funds in old accounts.”

Circle’s stance is: freezing insecure accounts is to prevent theft, not to confiscate assets. So they designed a recovery mechanism—via Arc smart accounts, zero-knowledge proofs, TEE attestations, off-chain legal documents, and more. But this means: if you lose signing rights after a quantum attack, you must prove “you are you.”

And the proof process will involve complex regulatory issues like KYC, sanctions lists, inheritance verification, court orders, etc. The paper specifically mentions that the industry might have a 5 to 10-year window to develop these rules.

The current question isn’t “how far away is quantum computing,” but “how high are your migration costs.”

Especially on EVM chains, if you hold a non-upgradable contract relying on ecrecover, you almost have no choice—either wait for a hard fork or transfer assets to an account supporting post-quantum signatures.

Circle’s paper also offers a calm reminder: don’t rush into migration just to “look secure.” For example, companies currently protecting private keys with HSMs, if they export keys to a regular CPU to sign for the sake of post-quantum signatures, they might be more vulnerable to traditional hackers.

Therefore, post-quantum migration isn’t a simple upgrade button; it’s a “move” across wallets, chains, custodians, and regulators. And since USDC spans over 30 chains, it’s like moving 30 houses at once.

Finally, don’t be fooled by the phrase “quantum computers are still far away.” Attackers are already collecting encrypted data today—this is called “collect now, decrypt later.” Your private data, like transaction memos and contract states, once recorded, will be exposed when quantum computing matures.

Circle prioritizes privacy risks first because signatures can be upgraded later, but data already leaked cannot $BTC be made private again.

So, do you think this counts as a real “black swan”?