It is quite obvious that majority of the crypto pump and dump channels are basically scams ready to rob you of your hard earned money by promising a hefty profit for a small investment from your side. Some of my friends succumbed to such scammers which is why I urge everyone not to fall for such tricks. Coming to the question posted by op, the best telegram channel according to me is the airdropalert announcement channel. This channel has helped me on countless occasions by helping me learn about new airdrops which has helped me earn big profits for simply filling forms.