I was even asked to pay several hundred thousand dollars for an interview 
Why didn't I think of that? 
For that price, I'll even give up on this for 2 questions:
Ability not to answer any questions
Seriously though, was that a serious answer or someone just pulling your chain a bit?
DeFi stands for Decentralized Finance. "The new way money is distributed".
Although, I don't think that it should be asked to every person.
Agreed. It sounds like altcoin advertising inside an interview.Although, I don't think that it should be asked to every person.