I think many coins will go to waste as there is market competition. Market competition is essential part as well to make coins stable and strong. I think ethereum is one of the best coins, and it carries a good future. Other promising coins include stellar, tron, NEO, MTC, ripple, EOS, CND etc.
actually, if a coun is popular it sdoes jot mean it will have a good future, everything depends on the crypticurrency team
you can never tell with the crytpocurrency world, so i do not want to make any predictions right now about it