First of all,its hardly not possible now for bitcoin price to crash to very low price as it continuously has a huge buy wall.We all know well that all the altcoins are priced in bitcoin value.So their price is inter related with bitcoin price.

Whenever a bitcoin rally occurs,all the altcoins would start bleeding meaning that their prices would start to fall low.This is mainly because most of the altcoin holders would sell their altcoins to buy bitcoins on seeing its price increasing.So,it would make altcoins price to fall more.