If so, that doesn't seem that groundbreaking. You could have simply liquidated enough of your gains to pay your student loans off. Instead, you're now in a leveraged position. It's very possible that your collateral could drop below the LTV threshold, causing a liquidation, which would magnify the losses you'd have if you weren't levered. There's no free lunch.

It's certainly interesting that DeFi creates new schemes for creating leverage, with minimal intermediation, but I wouldn't call it groundbreaking. It's an incremental development in financial engineering.

EDIT: read some of your other comments that you made while I was writing mine. It sounds like you're using stablecoins as your collateral, which seems like a smart move, and you've effectively converted your student loan into a DeFi loan at a lower rate. But I'd still be concerned that while your more mundane risks aren't that high (like asset prices and interest rates), you may have exposure to more complex risks.