Bitcoin is designed to be more scarce every single day while the population is almost required to increase its demand. Why? Because people will have to sell their failed fiduciary currencies per Bitcoin. The current financial system failed already and people will realize that Bitcoin is the only system to reset everything. Governments will try to create their centralized cryptocurrencies that will fail like the fiat due to hacks and the fact that people will prefer to use Bitcoin. Bitcoin is a blackhole that is swallowing every single fiat bill. 10 million dollars per coin is probably too conservative. People who dont own Bitcoin now will have to own in it later. Those who are acummulating BTC right now will be the richest people in the world. Bitcoin should hit that price in the next 10 years and there is nothing that could stop it.
The way I see it now, Bitcoin will exist alongside fiat and will probably be regulated.
Bitcoin is impossible to regulate my friend. Banks, central banks and governments are doomed. They would go bankrupt even trying it.
There will be a point in time where everybody will realize that Bitcoin is a blackhole that is everywhere and cannot possibly be stopped.
Fiat will disappear because it will be worth nothing against Bitcoin.
Everybody will HAVE TO use Bitcoin.
This is all just phantasies. I think that bitcoin will never rise in price above $ 50,000. The demand for bitcoin will grow, however, it still will not be able to lead to such a high price.
Also, banks and national money of states will not disappear anywhere. They are under the powerful protection of the state, and a decentralized cryptocurrency does not represent a danger to them.