good altcoins will always remain strong and survive anything. but shitcoins that are relying one certain things such as ICO will get dumped easily.
ethereum is going to have hard days ahead of it. the pumpers will surely try their best to prevent the big crash as the ICO stops slowly but i don't know how successful they are going to be.
bitcoin is not affected at all, it is rising on its own and based on real adoption.
litecoin is the brother to bitcoin and it rises with it. and with SegWit and LN the bond between them is stronger than ever. so is the rise.
XMR is a stand alone altcoin which will remain strong on its own. it has nothing to do with anything that is going on with ICOs and all that. but it was pumped recently so it may see some drop.
BCH is another story. it is the coin that was created to make miners richer and it has done it already. it will get pumped again when miners need more profit but other than that i don't see any future there.