I have a question! I am looking for an active messenger or telegram group (other platforms..) of crypto day traders to share information, signals, news...
Do you guys have any suggestions?

Telegram is not a secure platform. Scammers attack Telegram the most. So I think it is better not to take trading signals from Telegram . And Facebook carries a real identity of every person so I don't think it's wise to use Facebook Messenger for cryptocurrency trading or anything else related crypto. You can use Discord to take trading signal and also you can follow trading Discussions and speculators
^ Any social media group should not be trusted as a trader signal group. Most of them are not reliable as our references in trading, it is preferred to have our own research than relaying them our trading activity. A day trader needs accurate results which don't have a delay if a group gives a delayed broadcast of price prediction it could be will lead you to the wrong action which results in possible losses. So I recommend to anyone avoid them as much as you can have your own research then you are fine.
It's a bad thing to trust trader groups to make decisions when trading, even I have joined several times with a paid group traders, the results
are far from what I expected. Apart from constantly losing money, my trading skills also didn't improve. So as you said don't trust signal group
traders on any social media, because the result is the same we will only lose money. Because most trading groups only benefit the group owner,
so if we want to be a successful trader we should avoid joining trading groups. If we really want our trading skills to increase, I prefer to join
a trading course. Because based on my experience joining trading courses, I learned many things about trading, even some trading courses
provide mentors to assist us in trading. So the money I spend to join the trading course is much more useful, now i am starting to understand
how to analyze the market well, slowly my trading results are getting better.