Good that you ask about that since for sure this question bothering you since maybe you only see the rise of bitcoin nowadays. But for sure if you are still interested on bitcoin in future for sure you experience those devastating bearish situation.

You can't also say that NOT coin is safe for now since we don't know on when their hype gonna end since there are huge possibilities that once the investors is done with them then provably they might struggle to go up.

Maybe there's slight effect on other coin but don't expect anything huge since market is unpredictable.