It was at that moment that I truly understood — the four-year cycle theory I once believed in now seems far less reliable. If I had really chosen to buy the dip and sell, then wait for a cheaper price to buy back, one mistake would be enough to make you regret the entire era. The market's rhythm has long since changed, and the scale of participants and the amount of capital involved are no longer comparable to the past. Some opportunities, once missed, can never be regained. Conversely, those who held on all along are the ones who end up laughing last.