In cryptocurrency we trade so it will enable us to make profit and more incomes, we should have that at the back of our mind, I know there are expert in trading, but for those that just started crypto trading should know that the expert trader have been for long time and you think you can just start and become an expert it's a lie, you have to start from one point to another, and you will get to understand how it is, more knowledge will be coming to you as well, so you don't just start and become an expert.
Its only one thing you suggested to newbies that they are supposed to know, while you use the plural term "Things". Well, that might be a grammar mistake. The advice you have given is so obvious and sometimes people really face this issue. As after making a profit one or two times, they started to think of themselves as good traders or this is there thing.
While we should not judge a book by its cover too soon. We should not take decisions, on the basis of a few trades that went well. Like, leaving a job, changing mindset, etc., etc. We should really give trading proper time, to see if we can adopt it as our professional job like a professional trader or not. As new traders, are only after reward, besides the idea of thinking of themselves as expert, sometimes, its good to have an idea of becoming one, one day.