I believe you've already buy these coins that's why you are calling then gems, anyways I only know COTI out of the three projects you listed and I used to think that NOIA is a scam, maybe I am wrong about the project I don't know, for me I just prefer projects that have aren't ready to go hidden but ready to show the world about how serious they are, Polkadot and Avalanche wins my heart in 2020