Introduce a new feature "Locked CAKE Pool".
Allow users to stake CAKE for a fixed time period to receive higher APY.
An example: Lock your CAKE for 90 days to get 20% in addition to the current APY. If the current APY for the normal CAKE pool is 80%, then the APY for a Locked CAKE pool will be 100%.
This is somehow similar to Binance's Locked staking feature.