As long as it provide a reasonable profit percentage and run under reliable forum member
I think there is a lot of chance for an ICO become a seripus and legitimate project
You just need to do your own research and make a decision on it!
Ok then prove your point. Please post an ICO project that does not have a ponzi scheme in it. Which ICO do you think can "become a serious and legitimate project" for you?
For your final sentence, since you have done your due diligence and researched on them, tell us what the best ICO project there is and why it is not a scam. I hope you will say it is Ethereum.