Anything is possible, I'm not saying that bitcoin will replace some old currency, but in ideal conditions, something like that can happen I suppose.
I think bitcoin will always spread and grow. you do not be afraid if bitcoin not so well known in the world because it is the phase of the process of bitcoin. all need a process to reach the top level. including bitcoin. bitcoin they were 7 years old. would need more time to replace fiat money
Yes really bitcoin will grow better and I am sure there will be many people who started using bitcoin. Bitcoin will grow but it would not be able to replace the money. Although bitcoin grows money will not be replaced because money is the holder of the economic activity of a country that will not be replaced. Bitcoin only crypto so it is not possible to replace the money.