Answer: To use Aurora Chain, users must first set up a wallet and purchase tokens from an external exchange. Once the tokens are in their wallet, users can participate in the decentralized applications (DApps) and smart contracts built on the Aurora Chain platform. Users can also use the built-in decentralized exchange to trade tokens with other users on the platform. However, since there are no liquid markets on Aurora yet, users must be prepared to wait for buyers or sellers for their trades.