I don't think ICO projects which developed on NEO blockchain are much safer than other ICO projects developed depend on ETH blockchain . There is no place doesn't have scammer so don't hope that you can earn money by investing in every ICO project which developed depend on NEO blockchain . As I can see number of ICO project developed on NEO blockchain is really little but some of them are really good so it'll be a good chance for ICO investors but not all the time