We need crypto telegram channels because with help of these channels we will know what is going with the project right know. You can asked admins what you want or like to know very easily.
That is different. The channels being talked about here are run by non-authentic people who are self-proclaimed market experts and technical analysts. People who subscribe to these channels only help in inflating their subscriber number and nothing good comes out of it from reading a bunch of analysis posts just to pump the market. You need to do your own TA for that.
There are also some airdrops sharing channel .
Airdrops are just more shitcoins to pile up in your already filled up shitstack of tokens.
Some tines crypto channels organise quiz contest you can take part in it and earn some cryptocurrencies.
Thats not bad as long as it is a quiz that is not directed to buying/shadow shilling a certain asset. Like making the subscribers accept that a certain asset is going big when it is actually false.
So looking at these channels they are very good for giving us lots of news about cryptocurrencies.
Not really.