DEFI are all people rating too high and the room up. We are fed into exchange files into the trading system and added to outputs such as ETF, Future contracts. That made people more excited and bought more. The DEFI project only made a profit in a limited time and people quickly left. The same goes for every market, if the price increases quickly, the price decreases quickly.
During the DEFI tutorial that took place, countless projects were impersonating DEFI and generating tokens that were then sold publicly on UNISWAP. Most of them have discounted many times.