New DeFi apps will continue to be added to the Nervos ecosystem for the foreseeable future, but today there are a few options to earn rewards on the CKBytes you hold.
The most simple and safest method is using the Nervos DAO. While not technically staking, the Nervos DAO acts as an inflation shelter that allows you to earn compounded interest from locking your funds. The current APC (APY) is approximately 2.83%. You can read more about the Nervos DAO APC here.