So what would we do? Prepare to sell all altcoins to make a big dumping or continues hold? you say what we have known, but if we invest we must accept to lose.
Only you can decide, I believe by now you know that some projects are likely to be scam and die off soon, this type of projects you need to move away from them, and remember also that pump and dump do always end well because alot of people turned forever to bagholders which is something one must avoid