You can find some reviews at https://www.coinreview.com/best-crypto-trading-signals-channels-telegram/.
Blockchain Whispers have a huge following, and they identify lots of suggested cryptos that you can invest on. With possible rate of return put at up to 400% or more for premium crypto picks, this is the leading crypto signals provider at present. However, if you do not stand use of foul language, this is the wrong channel for you.
No 1 Best Channel - Blockchain Whispers
No 2 Best Channel – Goldman Stacks
No 1 Loser – Cryptoland
No 2 Loser – Palm Beach Signals
No 1 Mediocre Channel – Cryptonizers
No 2 Mediocre Channel – Asian Whales