The quantum FUD makes no sense to me. The years-months before a private key is stolen, every single piece of traditionally encrypted information (banks, stocks, personal data, etc) would be vulnerable if not already gone.
The financial system as we know it would collapse.
Then, either bitcoins price goes near 0 to reflect the broader market in which case there isn’t even much incentive to steal anyone’s coins, or the market price skyrockets as it serves as the last form of digital property. In the latter case, we’d have a least a little bit of time to prepare quantum proof keys.
