Dapper Balance is the easiest and quickest way to buy moments. When you make a sale in the Top Shot marketplace (congrats!) you will receive those funds to your Dapper account in the form of an ongoing balance. With this balance, you can purchase packs, buy individual moments in the marketplace. The ability to cash-out your earnings into USDC or directly to your bank account will be coming shortly. Expect an announcement sooner than later!
You may add funds to your your Dapper Balance directly through the account's payment page using either your credit card or cryptocurrency, as shown below: