I think altcoins can survive, as seen from altcoin prices now most altcoin prices rise from the downs it proves that more and more are starting to invest in altcoin, it means altcoin will be able to survive for the future.
I am believe that altcoin will survive and can compete with other coin. Many altcoin have good project and good dev. Some altcoin very profitable because movement in market more volatile than bitcoin. If you see on coinmarketcap you will see altcoin can gain until 100% in one day