Stability and abstaining from desire are the most important.
It's fine when winning, as it's easier to stop.
When losing, it's generally difficult for people to control themselves, always thinking that breaking even today is enough, but in the end, they continue to play, possibly making a small profit, or turning a set loss into complete ruin.
I'm thinking that in addition to skills, there must be irreplaceable risk control in trading to make money in this market.