No the bitcoin will not replace the dollar because the bitcoin is too small what already has been mentioned.
I think soon or later it could be possible but anytime soon it will not happen because too many people are depending on the dollar and the bitcoin is even depending on the dollar these days..
Bitcoiin and dollar are two different concepts and I think bitcoin will never replace dollar, bitcoin is like gold and not a currency in my opinion.
Yeah right, bitcoin is digital currency and not the real money, but dollar is real money, as quoted above both are different, we can't equate them. If bitcoin is globalised too we can't expect bitcoin to replace dollar, to my thought it is impossible.