yes . Digital currencies are becoming common here ......I totally agree to that. We are in internet generation
Bitcoin is not a real currency right now. But in the future I believe it can completely become a currency. It is difficult to remove paper money in the future so I think they will exist in parallel.
Naturally, it will be used widely but it does not mean that the society will become cashless. Fiat will live together with the cryptocurrency - paper money will never vanish.