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.
You can not simply conclude that bitcoin will be the universal currency because there are a lot of cryptocurrencies. Maybe for some chances, you can say that bitcoin can be the universal currency due to the fact that we are living in the digital age wherein computers is already a necessity, but still the legalization of it from different countries cuts off the possibility that bitcoin will be the world currency.