You went straight from ICO to DeFi projects. You forgot to mention IEOs, which were very popular in 2019 and this year many exchanges continue to conduct successful IEO from time to time. And as I noticed, some exchanges (for example, Binance) began to actively attract the most popular or just very promising DeFi projects for placement.
At the moment, you can earn good money on DeFi, but it is the same soap bubble as in its time were ICO.