The fact that the government does that today isn't a justification for doing it.

I didn't say I don't care about others. I do value liberty higher than life, however. I don't think a cryptocurrency will "burn the world to the ground"...

Governments are allowed to stop people from harming each other - enforce pollution controls, chase down criminals, etc. They aren't allowed to tell someone he can't use bitcoin because too many bad guys use it too.