You can find many projects and their promotions on this forum site, coinmarketcap and coingecko. It is necessary to conduct quite detailed research to understand whether these projects are legal or fraudulent. My first recommendation would be to research the team members of the project and look at their past projects. After that, you should read the whitepaper of the project and compare it with other older platforms on the market that have a similar purpose to this project. Then you should check the roadmap and follow the progress of the project according to the roadmap. Also it would be useful to follow the opinions of other investors regarding this project.