In order to enhance protocol stability, you'll need to be a POLK holder in order to create and resolve markets.
There are two ways of getting POLK on Moonriver:
1st Method: Get POLK on Sushiswap.
Pair in Moonriver (MOVR/POLK): https://app.sushi.com/swap?inputCurrency=&outputCurrency=0x8b29344f368b5FA35595325903fE0eAab70C8E1F
IMPORTANT: Ensure you're connected to Moonriver in your wallet. Learn how to connect to Moonriver in Moonbeam's documentation
Make sure you hold MOVR in order to perform the trade. Check where you can buy MOVR here
2nd Method: Bridge your POLK from the Ethereum Network to Moonriver
If you hold POLK in Ethereum and desire to move it to Moonriver, it's possible to do so through the Meter bridge to the Moorinver Network.
Check our guide in how to perform it here: https://help.polkamarkets.com/en/articles/5610552-how-to-bridge-polk-from-ethereum-to-moonriver