It so hard to find which cryptocurrency is Scam, but for me if the crypto have many discount gave and give-away that's sign of Scam. For you not to be Scam, I think you should search about the crypo you want to invest or you should just invest in the Top10 crypto in the world.
But all Top crypto were also projects, and used the ICO. So many projects that launched now can become top in a year or two. I belive in projects that appers now. I think that projects like Romad, Teluria, Scyf chain, Menlo.one and other become good investment.
I believe in Menlo one almost as much as I believe in projects related to renewable energy (GreenX & WePower). One thing they have in common is that they are both game changers which means they could literally change in a positive way, how we view ICOs and power consumption respectively.