When BTC crashes next people believe the money will flow back into alts, but this time I think some have really just leveled off or will die off completely.
I have some doubts about it. Usualy while bitcoin is having a strong dump most of alts are red together with BTC. When BTC crashes most users will just try to pick fiat.
the good seasoned alts with real use cases and functioning software will rise.
the rest .... well
Well, the more hyped alts (like bitcoin cash, lol) always survive. Such forks can be even good for usefull alts because it makes them less speculative.