You are aware that there are so many scams projects nowadays and most of them could come from new projects. I think that was enough answer to your own question, so you better stick only on old and proven projects for years as they are guaranteed to last for a couple of years than trying your luck on new projects which might not last long enough even if they show a good start.

You only need to keep in mind that there are still a few risk involved even in the old projects so if you are afraid to lose money even if a small amount or for temporary only then you better stay from investing. You better sit there and do nothing but you will also gain nothing that way.