It really depends which group you following. If you are a newbie with trading - Yes I can tell that it is worth it.
If you are an expert - you will not looking such groups / Telegram channels.
However, if you decide to join to any Channel, you should always do a research before. why? because there are many channels that not worth the price.
You can read this Article about Crypto signals that will support your research. Here it is:
https://smartoptions.io/telegram-crypto-signals/