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If it rises too much, it will fall, and if it falls too much, it will rise.What is iron logic?

If you feel unconvinced, you can buy stocks on the same day as me and send them out on the same day, so that everyone can see for themselves whether they have risen or not, instead of deceiving everyone with your poor P-chart, or satisfying your pathetic vanity of losing money every day to find a sense of existence.What is the only certainty in countless changes?

What is the only certainty in countless changes?If it rises too much, it will fall, and if it falls too much, it will rise.If it rises too much, it will fall, and if it falls too much, it will rise.