Who told you that? Do not get it wrong. Fiat are subject to inflation. If I borrow my country's currency today, and I want to pay in next year, if compared to dollar, the price will have reduced. The best currency I like to borrow is fiat because it's value mostly likely will depreciate so I can pay less than what I borrowed.

Maybe you have not been scam with DeFi project, if you had, you will know how DeFi are very risky, their are some DeFi projects that are whitelisted but yet pull an exit scam, how would someone know about that? DeFi are not just secure and safe by design yet, they need more upgrade, DeFi is also not private as people think. If I am asked when next DeFi scam could possibly occur, I will choose next week because it occurs too often.