I think that of 2.100+ altcoins currently listed on the CoinMarketCap on only a few will survive in the future. And there is even a possibility that Bitcoin will be the only survivor, since it can acquire all the current positive features of other alts.
day by day there are a lot of projects coming up . and i agreed only some of them 'll survive in future .
and the rate ups and down depends on volume and news .
Only bubbles. Creat so much altcoin then die. I think we will have some majors crypto currency such as : BTC, ETH, DASH, DOGE, XRP can live with bearish market.