The first and most obvious target will be Bitcoin. It’s market cap today is $1.4T. That’s a gigantic reward for any state actor or entity with the resources and budget to break it.

Does this mean Bitcoin is going to $0? Absolutely not, it’s just going to take the community organizing and putting in the gigantic effort to make the changes. Frankly I’m not personally clear if that means all existing cold wallets need to be flashed/replaced? All existing Bitcoin miner software needs to be updated? All existing Bitcoin node software needs to be updated?