I guess Yes It will be the universal currency in the future because of the trend of a computer. The online market or shoppine is now available which you can use bitcoin the buy or to shop online. And also bitcoin use to invest, to gamble and to trade that is why Bitcoin deserve to be a universal currency in the future.
Right now, computerization is there in all sorts of life, if we do not want to follow it would be missed, as well as the bitcoin I'm sure will be the universal currency like the dollar today as a benchmark fiat currency