I have started a new service tracking Telegram pump and dump groups. 90% of these are scams, but the other 10% are at least possible to profit from. I do all the work so you don't have to join 100s of these (like I did) to find the few that are legit.
Please see http://pumpanalysis.com and follow me on Telegram (https://t.me/pump_analysis) for my commentary. Feedback very welcome.