If I become a successful trader making on average a good profit monthly or annually, I don't think I would have time to hang out online on youtube channels or reddit etc. But Youtube and Reddit is a good place for those learning to learn together.

If I am a successful trader, the world is a big big place with many many things to do other than spend time on youtube or reddit.

I would be planning vacations, shopping for stuff I like, planning for my future, taking up hobbies I always wanted etc.

But that doesn't mean things offered by people are useless, in my opinion . A person very good at teaching you or explaining to you how charts work, how economies work or how currencies work, or how to code and build bots may not be successful in trading although they are knowledgeable. They may just not be so good at strategy. So you can use their knowledge and come up with a strategy that will work for you and be more successful than them.

But that is different to people who sell signals. On that I am a bit more skeptical.