I think the question is quite....broad or too optimistic. Of course not every crypto coin is going to survive, even if we would count only those who are making it out of the ICO process alive, which is thinning the whole thing a lot. And like many products which are successful at first but not on the long run, only the best, most adaptable, useful or best-supported are going to stay. Does not mean doomsday is upon us, just pointing out, that crypto is a very normal market these days and normal markets tend to be competetive and pushing out a few possible options, for one reason or the other. Who is good enough is going to find enough aid, either from small users or big names.