I think so. its happening already what can we expect? we cant stop things to happen.
as bitcoin slowly eats up money, money is slowly disappearing. nothing is impossible
bitcoin will be the national currency someday
Don't say within 15 years I can certain that bitcoin will never replace dollars within next 50 years, Why? You should know mainly currencies (includes Dollars) the its value is attached with valuable commodity and circulation quantity depend on accumulate Gold of Government, this mean is dollars or any paper currencies was guaranteed by gold. While bitcoin is a digital currency i think it's not guaranteed by anything although the price of bitcoin now is very high but in a good day it also can disappear
Furthermore dollars is currency of America that the largest economy in the Earth so you think American government will accept to bitcoin replace dollars.