DeFi will continue but their trend will end in the next few years. Crypto will always be innovating all the time. Developers will always find interesting ideas for future Crypto developments. Nobody knows how Crypto will develop in the future but DeFi won't end.
I have the same thoughts as you, sir. The DeFi's trend will last in years but the hype will just stay, I guess, in a few months. Everyday, there are always new innovations and curiosity will never end, so I think it there will come a time that new trends will pop up. I am hoping that new trends in crypto world will always be hyped, but I know it won't happen.