how to look for ICO like ETHEREUM on some years ago ??
You seldom find ICOs with real products, real use case, and real demand today.
If you are interested in investing in ICOs/STOs/IEOs, you may want to look for projects that offer something unique or something only a few have ventured into. Personally, I like those who are venturing into renewable energy (this is just my take).
Is Airdrop Token is the FUTURE ?
If you want to collect tokens without exerting much effort, then why not? Just do not expect that much, most of them might turn out to be less than $1 though.