What did you look out for before investing in an altcoin?
If i want to buy an opensource PoW cryptocurrency that had fair launch without any instamine/pemine/whatever scamming. I ask myself if this coin have usecase and will be used 10 years from now. Nothing else. If that is the case then there will be developers and community. They will come to the project if are not there already.
If it is a sort of unregulated security. So an ICO token to backup a project, then I ask many more things beside usecase. Because here there will not be random developers jumping in. You are depending on original developers. They got paid in ICO to deliver and maintain. If they are not capable off or even just a scammers project dies.