Government money is owned by government. Their money, their rules.

If you choose to do stuff with it, for example: earn the right to become the legal "bearer" of some of it, then it's still government money and you still have to play by their rules.

You know those weird laws that prohibit people from burning or deliberately damaging legal tender? (I know at least a few countries have such laws, probably most.) That's because even if you're the rightful bearer, the money still isn't yours!

Saying things like "this is my money" (and the gubment is trying to steal it) is usually intellectual laziness, unless you're claiming that your government is trying to tax the bitcoins you control (or other tokens of some other system of money that they don't own). Then that would be theft.