Not all crypto signal groups are bad, they are all created by scammers. There are still lots of groups that are helpful and share knowledge as well as share some signals to refer to together. But those groups only operate privately with some close members, not sharing to the outside like other scam groups, you can't find those groups unless you know someone.
The best way is to do your own research and find out, relying on others is also not a good thing because we cannot be sure that they will always be right.

Never ever pay this Crypto Signals & Automated Trading channel. I have joined the Premium this channel offers for $49 and all I can tell so far is that I have wasted my money. The quality of signals is very low. about 2 out 10 signals ever reach their first target and the rest hit the stop-loss. Contrary to what the name suggests there is no automated signal to let the trading bots like Cornix do the job. They do not determine R/R for signals and the duration of each signal is unclear. They put their few successful signals as proof on their public channel to mislead people into buying their service