You can't be 100 % sure if the project is fake. I always recommend to my friends to invest only in the top 100. It is too difficult in the crypto market.
Otherwise you should search about the team members if they are real and authentic persons and check the registered address of the company.
That why we need to make sure by doing our own research about the projects first before investing. We cannot rely on what other said about the project as most of the info provide at the internet was not a 100% correct and can be trust. Use our own sense and gut to believed the projects are fit with our own criteria or not.