Imho, DeFi is a hype. Like 2018 was a boom for ico, 2019 was full of ieo, and in 2020 everyone tries to add DeFi in their projects. Come back to this post in 2021 and re-read what was written here.
DeFi is not something really new. It could have appeared in early years, but cryptocommunity was kinda busy. But now, during World economy drop, DeFi is just in time Mark my words, nothing but a hype.