The goal of staking on Perpetual Protocol is to ensure demand for PERP, while also keeping PERP off the market. This goal exists to provide the ability for the exchange to react in emergency situations, such as extreme market events. Such an event, one example being a severe market crash, could cause the exchange insurance fund to be depleted. PERP tokens will be sold at market to cover any shortfall.
Stakers are compensated for shouldering this risk using rewards. These rewards will be updated over time in order to maintain a healthy number of staked PERP.
For further info about the staking program please refer to: https://docs.perp.fi/getting-started/staking