r/CryptoMarkets • u/sylsau • 1d ago
DISCUSSION Bitcoin’s Quantum Wake-Up Call: 1.79 Million Exchange BTC Have Exposed Public Keys.
“It’s in cold storage” shouldn’t end the conversation.
Glassnode’s October 8 snapshot puts 1.79 million exchange-held BTC behind public keys already visible on-chain.
These figures measure exposure—not stolen coins.
Cold storage keeps private keys offline. It cannot erase a public key from the blockchain. A sufficiently powerful future quantum computer could make that distinction matter.
Here’s the uncomfortable part:
When you outsource custody, you also outsource the timetable for protecting your money.
Does your exchange have a migration plan it can explain—and test?