I think everyone should use bitcoin, regardless of political boundaries. It's what ties everyone together, from me to some shithead scammer living in a dirt floor whorehouse in Africa. This is what I like. Governments should stay the fuck out.
But I think you are delusional if you think that governments are going to simply give up on their monetary control and just use Bitcoin. Governments love to have control over their own monetary supply so that would disappear if they use Bitcoin.