Now we can see some countries are regulating bitcoin and some government don't like it.Otherwise Bitcoin hasn't a stable price.
So my question is can bitcoin be a main currency of world economy?
I think government can not ban bitcoin or others cryptocurrency. Government just want every bussiness entity comply with their law regulation. To be main currency in the world, i think bitcoin need approval from most country in the world and i think its hard to be done because no authorities can control bitcoin