It's very hard to get out from the scams. No one can 100% guarantee we can avoid all of the scams. But we can get some protection by things learning well. Usually, we know how to find good ICO by checking the project team, Whitepaper, and other important stuff. But the problem is projects getting fail with the time. Some of them have very successful ICOs. Some project teams couldn't continue the project and the get failed. after that, they have gone and project get scam. So check roadmap as the very important thing. that will helps very much.