One thing is clear. Digital currencies are the future. Fiat money will always disappear more and more. And after that some digital currency will be available everyhwere. The question is just, which one? Something like paypal, or do we get a real cryptocurrency who will be controlled by the people? I really hope it will be a cryptocurrency. Because i dont want to support the banks anymore.
I'm not sure about Fiat money would disappear, For me its impossible to happen because not all the people are supporting cryptocurrencise and not all the people know the existence of it and I'm sure the government will not allow this to happen but I hope bitcoin and other crypto would recognize as one of the global currencies.
The future of virtual currency like bitcoin has a huge potential in making the economical growth of every country, It provides the right projects , investments and other sources of income, It will provide people who are in need of job, profits, it will hep the poor countries to survive in the future, It can help agriculture and it will help the government of every nations. I guess its future is as vast as that.