Looking back at the 20-21 bull market, the biggest profits come from: Bull market engine (defi asset group) Strong Zhuang currency hard-forged narrative (alt L1 faster eth narrative, solanavax) Ponzi’s capital market (stable, luna, axie) Pure Air Imagination (meme, metaverse) In chronological order, the bull market engine started to work in the early stage, the strong banker currency kept up in the mid-term, and the Ponder's Fund market ended in pure air in the later stage.