What are the things to keep in mind when looking for an online course for trading?
In my opinion, I'm not sure about the effectiveness of those courses. You need to consider the reputation of the instructor and do they show you the profits they have made?. I think before starting those courses, you should do some relevant research on google or youtube, there are a lot of videos and articles about crypto trading, you can learn the basics of trading from there
What you've done is going to consider as relevant research already but asking to show the profits that they have is not necessary and in fact, it is not the basis of their legality or likey being said as a good source of information. If I go online searches, it doesn't matter for me because what I wanted is the ideas and information I get from them, and besides, we can also assess if they are reliable or not without asking about that, it is simply my using our common sense either.