On the upside, advanced quantum computers could crack that 12-word seed phrase from 2013 that was scribbled on a piece of paper your mom threw out. But that level of encrypting ability can also unravel cryptocurrency’s core security … womp womp. 

Q-Day is the Y2K-esque time when quantum computers become advanced enough to decode all cryptography. Google recently warned it could be coming for cryptocurrency before the decade’s out. In a new paper, researchers wrote that quantum computers would need fewer than 500,000 physical qubits to break through bitcoin and other cryptocurrencies — 20 times fewer than previous estimates. 

Google researchers noted that 6.9 million public bitcoin keys are already exposed, leaving them…