A sweet experience when the price of bitcoin is around $ 20,000, and at that time I sold some of the bitcoin that I had and made a substantial profit. But now it's a bitter experience that I feel, where there is a regret because the price of bitcoin always decreases over time, if only I sold all the bitcoin that I had when the price was $ 20,000, it might be a big happiness, but hope prices rise higher again, it turned out to be a long way off, really a bitter experience