Then stop invest in scam project. Most are so obvious it is cringe material seeing people invest in them. Only invest in real project which takes an evening of research.
It is funny that a lot of people keep complaining about scam projects, but they are not asking themselves how they keep being a victim of one. There is no way a project will be scam without noticing as long as the person is ready to dig up very well all that is necessary to know about the project from the team, the availability of product and ask technical questions to know if the team are actually set to work but a lot of these things are what some people take for granted and just invested in anything they feel like.