After this big crash there are too many bag holders and people will sell every chance they can get.
Well, what we have experience today or it will take few days to recover the downfall of price in all altcoins are basically the flow of demand and supply. This will lead to a big crash because the bitcoin is finally increasing in resulting to many have sell there coins so a lot of supply in a market making the price will dump into a very low price. After all this big dump it will reverse it with a green price in a market.