I think the most important thing to become a trader is to control your emotions. Many new traders often let their emotions overwhelm and they often make the wrong decisions. If you have negative thoughts while trading, it is best to stop and resolve those emotions before returning to your trade.
While controlling your emotions is important to me that is the last step, after all to let your emotions affect your trading then you need to already be trading and that should not be possible until you get all the necessary skills to engage in the activity, so only after you have mastered all other aspects of trading you should worry about controlling your emotions, still it is a very important step because if you do not then nothing you have learned before will matter if you sell your coins if you panic.
Controlling emotions is difficult if we are in a Bearish situation which causes the value of our assets drop dramatically. I agree Controlling emotions is the most important thing in the world of trading. Without good emotional control, you will often experience losses.