Money changed its shape through the history. As from non-monetary exchange to the need of having money. Fast forward to our current banknotes which are in my opinion slowly dying with bitcoin taking over. Many discussions are being held if bitcoin can be the primary currency in the world. Let's assume it can be. Everything has an end so what do you think will come after bitcoin? What will money look like hundreds of years from now? I predict its gonna be digital of course but I'm interested if its going to be a cryptocurrency or something else.
This is just my opinion and in my opinion, as seen in the design of bitcoin or a digital currency there is a high chance that the time will come when it is very likely that it will be replaced by the currencies we use today. In short, Bitcoin can become a world currency. I'm just a bit of another bitcoin fanatic here in this forum if I have the same view.