do you think we will only have one currency to use and that is bitcoin? Or will we still have different coins (altcoins)?
Bitcoin is used to trade for a long time, be it virtually or in the real world and since it is the first coin and the sheer number of users using it makes bitcoin the go to coin when it comes to crypto market. Any coin which makes business easier with low transaction fees and immediate confirmation will win the race in the long run.
I predict that we will have some kind of Blockchain based Crypto currency for every country in the real world, very soon.
With the way things are going we might see every country coming up with their own crypto currency but the fact remains that we need a decentraziled currency without the intervention of any goverment or central authority and bitcoin will thrive in those situation on principals alone.