no, i don't think so, but i think it will "accompany" USD more like now, and it will become more and more popular
Well, although bitcoin very special on the internet, but I also do not believe that bitcoin could replace one of the world's currencies, especially the dollar. Well, bitcoin can be compared with gold, but with the dollar. it is because bitcoin has a very high price. so, I feel that bitcoin only be a viable alternative.
Indeed, bitcoin can always work as an alternative, because we all know that no government would let their citizens use a currency that is not in their control because if they do this they will lose control on a part of their economy, and they wont like that to happen nor they will let it happen.