bitcoin can't replace the dollar until people stop exchanging their bitcoin into dollars
Even if people will stop exchanging, some compare system will be needed for bitcoin anyway. Bitcoin can't really replace dollar anyway and it's true.
It is not true bro. people exchanging bitcoin to dollar because they can't buy everything with bitcoin right now. so this time they have to exchange their btc. but bitcoin is getting more popular every day. and more marketplaces started accepting bitcoin now. even in some areas bitcoin is being accepted in real lives. shops and restaurants. whenever bitcoin get its place properly. and every one start accepting bitcoin. that day bitcoin will replace dollar.