I don't think so. It just a daydream.
How you can expect that Bitcoin is going to replace dollar, are you crazy.?? You can't imagine the platform of dollars and its credibility.
So there is no way to replace dollar by Bitcoin.
i do not think that it is a dream i think it is realty and we have to accept that reality that anything can happen in this world, and i think if all the people of the world start using bitcoin which is already the trend of the new generation then bitcoin will certainly replace dollar.
That's so much to ask, I don't think all the people in the world will be able to use bitcoin, remember that it is an online currency and not all of us has access online or well educated with online currencies. If the social media were not able to gain an adoption of the whole population, I don't think bitcoin can.