if in a few days I don't think ATH can be reached, it might take at least 1 month from now for ETH to reach ATH. that is a prediction from me. but the market that has the right to determine where ETH will go
I doubt ethereum can reach it again.
no one knows about how much time that needed by ethereum to reach its ATH again.
Some communities are talking about what will be happening in the next months and they said that if it's possible for ethereum to get another dump or the history will repeat again.