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.
I do not think so much is the use of bitcoin because of the volatility of bitcoin price movements and uncertain prices tend to not shop online immediately. But when talking about universal currency in the future is likely to take the lead in the bitcoin list because it has been a great deal of umpire and it is far from what it can possibly happen. In my opinion