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.
Agree with your opinion, if bitcoin could be the future currency because today's advancement has been demanded using computerized so all integrated, now we can spend online by way of payment using bitcoin without having to use bank account or credit card