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.
We cannot image at the present moment what is be next after digital currency ?
Most of us will not be alive to see the next invention after digital currency.
Unless something can be invented to take over bitcoin, then cryptocurrency is just going to develop and will co-exist with fiat. And also, it depends on the government if they are going to impose threats to the users just to stop cryptocurrency and I don't think that is going to happen. Though right now, the adoption of cryptocurrency is still on it's way.
Crypto is not fully implemented yet and there will be a long way to go before we see bitcoin fully replaces the fiat currencies and banks.