These are a few point out of many on how to detect a scam project. Before deciding whether or not to invest in a project it is very necessary that you carry out due diligence to help you make informed decision.
If a project does not have a clear use case for their token or they have an ambiguous use case or unrealistic use cases then it is possible that the project is a scam.
Any project cannot keep up or will not stay long in the market without use case and trust coming from its community, we have seen so many pumps and dump coins coming out and after a few months we never heard or they are losing volume and price sliding, it's very important what the project can contribute and how they interact to the community, with these two the project is sure to die.