There is even better rates available. The Anchor protocol pays 20% APR! And the principal is protected as described in the white paper,
> Anchor offers a principal-protected stablecoin savings product that pays depositors a stable interest rate. It achieves this by stabilizing the deposit interest rate with block rewards accruing to assets that are used to borrow stablecoins.
source: https://www.anchorprotocol.com/docs/anchor-v1.1.pdf
You literally cannot lose! And the gains are in a stablecoin (UST) so you don't even have to deal with the volitality of crypto
https://www.coindesk.com/price/terrausd/
Tradfi doesn't offer these kind of risk-free rates because they are greedy vampires, unlike your friendly smart defi devs.