Many people are shouting 'buy the dip', but the true bottom is never written on the K-line; it is hidden in every moment you dare not buy. When emotions begin to spiral out of control, the community is filled with criticism, mainstream media starts to lose interest, and even your friends around you are cutting losses and leaving, that is the true bottom signal. You cannot wait for 'confirmation of reversal' to enter the market, because by then the price has already doubled. Buying the dip has never been a skill, but a test of belief. You must understand the project in advance, judge the trend, and plan your position in order to decisively act at critical moments. Don't envy others lurking at the bottom; those are the ones who stepped on emotions and walked out, not by luck, but by understanding.