"Everyone has a ruler in his heart, and this ruler changes with the growth of people's experience. Only by controlling the ruler in his heart can he do business without fear" The variability of the market: The author once said that the changeability of this market is due to the fact that different participants have different sensitivities to different "prices" (here refers to the amount of participants entering the market). In the same way, you can think sideways: there will be corresponding p
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