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.
Its been for years already. Aave had been around for years, Its just that its hype these days. But I think this is meant to kickstart the bullrun, if its hype is going to die down, the bullrun might not really happen. It is however very alarming because of the volume they have and the prices sky rockets. YFI for example has twice the price of BTC.
What could be more revolutionary for these defi is the synthetics like they can tokenize the real offline companies, I think its more useful for people start to trust the defi platforms like AAVE.