Don't be too hopeful for any coins that has been massively pumped before and dumped because the project owners might not even have the intentions of reviving the project again because they must have already made the profit they had want from the project. Instead of reviving any dumped project, they will abandon it to survive on its own but during another bull season, they will use the same idea to create a new project that can be used in ripping investors too. During this bull season, not many altcoins were able to even get to previous ATH as the last season.