I bet that in 5 years from now (even faster) Bitcoin or other cryptocurrency will join too.
That is highly unlikely.
First, Bitcoin would need to become a reserve for a country.
i can see this happening easily in soem corrupted country, that are very poor, if bitcoin will have big adoption in 5 years
does countries like liberland count for this? i doubt but maybe

Liberland is a freaking joke! A tent, a flag, this guy that has proclaimed it a country and million of mosquitoes! Trust me, I know quite well this part of the world!
If we will rely on Liberland, we won't get much further!