Either pumps or dumps, they both have their advantages and disadvantages, it depends on how you plan to use them.
Traders can make money off pumps or dumps, and investors can get into good projects at cheaper price, I as a person always avoid projects when they already pump, getting into the project very cheap is the best thing to do, you will make profits easily doing so.
I have seen people walking away from crypto projects because the price is dumping, this is a wrong strategy as an investor, when the price dumps is the best time to start buying and when pumps comes is the best time to start selling.