Money doesn't make politicians, people do. Money is just what gives them more power.
Why would Bitcoin be a means to achieve a political end?
Bitcoin, or it's successors, makes paying the State an entirely voluntary affair. They can't even prove how much you've got. When people cannot be forced into paying the State, the State must convince them to pay. That puts them in market competition, if not with each other, then at least with all the myriad other things money can buy.
Yes, but it doesn't remove the government, it just makes them more honest (unless they basically kill everyone who carries bitcoins like they currently do with any lethal weapons).
Government may be a flawed principle in itself, but I think short of some advancements in Eugenics, our need for government is far from over.
An honest government, in market competition, is functionally identical to an AnCap defense firm.