Recently I`ve read the article that the bitcoin will displace dollar in 15 years. and it`s impossible at least because of the trust level of the users of bitcoin. At least, because the economy in USA is regulated by bursts and downs of citizen participation in the processes. I don`t have any economic education but  understand the simple interrelation. all these saying about bitcoin in dollars when "experts" say that it will displace dollar are only the advertisement agents, IMO