You’re talking like you just found a gold mine while in reality these telegram channels are everywhere and not special at all.Most of them are scam and shill groups promoting their own shit coin and the legit ones are probably paid.

There are many groups just as you’ve mentioned, if you research for most of them, they can easily be found in telegram. But you know what, when there’s a group like that.
It’s unavoidable to see those people that are going to shill the projects they’re promoting and supporting and that’s what is annoying with that. It’s hard to find a group that’s pure trading information only.