I am simultaneously involved in e-commerce, stock trading, and cryptocurrency trading

I have also experienced losses in all of them, and I finally realized that the underlying logic is the same:
It's not "the money earned through effort," but "the money from differences in cognition + probability + position size."
Effort only guarantees that you won't fall behind
What truly widens the gap
Is whether you dare to place big bets after calculating the odds clearly
The risk-reward ratio is the core of all business.