I used to use Ledn and Hodlhodl in 2020-21. Its still risky as Ledn has custody of your BTC during the period of the loan and hodlhodl could potentially be both the lender and the platform.

The rates are high for borrowing as there's still not much competition. I don't think I'll use them unless I have to. A lot of bitcoiners have the idea that they're going to just lend out their bitcoin and live off the yield (ie never sell your Bitcoin). If too many people do this it creates too much risk for the entire network. Its not worth it. Spend sats as needed. Earn sats, save in sats. This is the way.