Yes, got you intrigued, didn't it?
Bitcoin is a very good thing to have as an asset. Just like gold. Even better if I may say. It's secure, and unlike fiat money it actually exists and work is put into it to produce it. This makes it great to store value.
However, it cannot and will not replace current fiat money that the entire world it using. It just cannot.
Take paying a cup of coffee for example. To pay your coffee with bitcoins, one must get bitcoins first, either by mining or buying bitcoins with other kinds of money (*cough*fiat*cough). It ends up being a quite complicated process, don't you think?
Until we reach the point where paying for a cup of coffee is as easy with Bitcoin as it is with cash, we will never get mass adoption. And as far as I see it, there is no way of simplifying the acquiring of bitcoins.
Yes,bitcoin cannot replace fiat.Even now,in many countries,most people dont even have a bank account and debit card,credit card.They dont know about digital transactions.What they know is paper money which they can feel with their hands.In future also,Fiat currency would exist,but its usage would get reduced.Bitcoin would be a secondary payment option.
The main problems were decentralized and could not be controlled, surely the country had a large consideration if using financial fiat money, can be controlled and full of manipulation. Dangerous if countries use the bitcoin, because it can be controlled by a person or group.