Many cryptocoin have no real usevalue and by time these kind of coin will fade away
Yes most the crypto will not survive and it will just fadeaway along with the time I mean crypto like dogecoin and tron etc as there are better altcoins offering better features than these crypto and only the best will survive
if I think the crypto that will survive is the crypto that ranked in the top 10 coinmarkecap like, nem, eth, stellar, there, ripple, because they have a good project in the long term