Let me add some details. 2021 can be divided into two halves: the first half when it surged to 2000, and the second half after it halved mid-year, dropped further, and then recovered to 2000. The strategies for these two phases are completely different. Ignoring this detail could lead to vastly different outcomes. The bull market for small altcoins and meme coins was mainly concentrated in the first half, while the profit-making opportunities in the second half were primarily focused on new blockchains and the metaverse.