In the table below, we have listed all the best USDC interest rates. As you can see you can earn up to 14% on your USDC holdings. However, there are terms and conditions applied to get the 14% with Crypto.com.
The highest interest rate with no additional terms does YouHodler have.
BlockFi has the best deposit bonus for crypto interest account. Also, Celsius´crypto deposit bonus is great and doesn´t request the same amount of first deposit as BlockFi bonus does.
Source: https://www.cryptocoinzone.com/passive-income/best-usdc-interest-rate-and-savings-accounts/