During the last months, particularly during the last weeks, Ethereum has dropped spectacularly, and all the tokens that are paired with it have gone -80% or more. Can we say that the dirt has been cleaned and we can now invest at the right price?
Yes, you can say that. Particularly, when those tokens are an erc-20 which is an eth based. They have been dropped drastically like eth does. But you see, after that red market the corrections are happening following bitcoin's steps.
ETH is still working on it and volatile coins are still in the market. You should follow the last month trend and then decide what are in it. I would recommend to watch for a few days as I am doing so.