Love her poise. Her evident mental conditioning. Compare her approach to the countless brutes who throw themselves at it...and fail.
This isn't even a trading video. Here is a hilarious one most of you have probably seen: https://www.youtube.com/watch?v=4ZaHJ4z3JP0
Except it isn't paramount. Knowledge is. All the self-esteem in the world won't get you consistently profitable. Only knowing when to enter, how much to enter and when to exit will do that.