There are many negative comments abount participating in ICOs nowadays because it might be scam or it may not succeed. If you are planning to join in any ico, have a research first regarding the ICO you're planning to join. See their project if it has a potential to succeed or not.
I hope most of the people follow this advice. meanwhile, some ICOs and their teams seemed to us so good...and they vanished. yes, it is also a great risk to make these investments, but the riskiest guys now are rich.
Honestly, the best choice for current market is save all information of devs team. If they scam me, I will use that information to give it to the police to find them on the world. As long as the total amount they scammed larger than 1 million dollar, I believe the government will help us to find them. Of course, the information I saved is real information.