No doubt that crypto currencies will survive for a long long time.  I think that there are a lot of crypot currencies which have good future and i think that in future it is expected that their price will increase too much. we just need to remain in the market and study the market regularly. In fact still the interest of the people in bltcoin and some other altcoin is increasing because they already have got a good profit from there and still they believe that bitcoin will continue giving them a good profit.