I specifically included "some willpower" because I knew someone would bring that up. Technically, if you stand your ground and go to prison for a long time (or

I specifically included "some willpower" because I knew someone would bring that up. Technically, if you stand your ground and go to prison for a long time (or are going to prison for a long time regardless), the money won't be seized. Similarly, if you forget your passphrase or die, the money won't be seized. Or if you have a multisig wallet setup and your accomplices don't get caught, the money won't be seized. I believe there are multiple actual instances of the FBI not being able to seize rather large Bitcoin wallets.