Many coins and tokens are coming out every days and more than 10 are been add daily. How many of this coins and tokens are going to remain in five to ten years to come? I think many of them will become worthless in three years to come as most of them have been abandoned by the developers.
Your time frame is kind of long this market has not existed for 10 years and the only coin that old is bitcoin, so I suppose that of all the altcoins created today we are probably going to see a percentage below 1% to survive for that long, I know that when you think about it you realize how this market is filled with projects that in a few months no one is going to remember, which is yet another reason to invest in bitcoin instead.