Satoshi's $75B in Bitcoin could be cracked by a quantum computer one day.

The obvious fix is to freeze all old wallets before that happens. But that forces Satoshi to move his coins publicly and prove he's still alive.
Paradigm just proposed a way out. You create a silent cryptographic proof today, proving you owned your keys before quantum computers existed, without touching the coins.
The problem: Satoshi has to do it himself. If he's dead, the coins are just... waiting.
For quantum thieves. Or a network vote to burn them forever.
Nobody knows if he's taking the out.