I agree, emotion is one of the deadliest things that an investor can have. Emotion makes you sell at the bottom or buy at the top. Emotion can hinder your ability to make a rational investment decision. You may hold on to an investment that should really be sold or buy an investment that you have no business buying. In the long run emotional investors will likely under perform investors with their emotions in check. Also another very important thing you mention is researching investments and not jumping in blindly. Doing this will help you avoid many mistakes and educate you along the way.
thank you for commenting, the best indicator for this is treating the crypto currency, the emotional investors enter the short-term price forecast and when you look at a stock market you see that most people buy when the price jumps and when it falls because it falls, in any investment it is necessary to enter the understanding and with a great deal of patience and long-term thinking until it's profitable.
control of emotions in life is the most important.
Agree, I would not have made anywhere near the amount of money I have if I let my emotions guide my investing decisions.