We all have dreams for bitcoin that someday we will be able to use this coin freely and no other things to think since its already accepted by the society, and the government already stop holding bitcoins neck and allow it to be use without any policy or regulations, here is my dream this is how it will be organize
1 . BTC will be the primary money all over the world all the currency will be just secondary
in 10-20 years from now?yeah i think thats possible but not in our time now because countries are continuing to banned bitcoin
2. All the world currency will be exchange to bitcoin slowly until its all illiminated
nope Fiat will stay(for me)because there are utilities that need to be paid in fiat at certain time.
3. Altcoins will be use for very country and bitcoin as its Superior
yeah exactly ,altcoin(those legitimnate)will have a function to serve people but next to bitcoin only.