I would say they should not but considering their crypto experience, therefore, they must act cautiously. They should not invest and follow what these influencers are saying but rather urge themselves to research.
These are the reasons why they should act smartly;
 - most new projects are scams and have no working product
 - not listed in any exchange, a thing that has to be considered as well

In general, the risk is too high than buying old projects, and less confidence that we can get ROI.