To cash out on River Dragon for free, start by completing daily tasks to earn coins and experience points. Next, participate in various in-game activities such as spinning the wheel and completing challenges to accumulate more rewards. Utilize the in-game chat feature to interact with other players and potentially receive gifts or tips on earning more coins. Join a club or create your own to access exclusive benefits and opportunities for free cash outs. Keep an eye out for special events and promotions that offer bonus rewards for increased chances of cashing out without spending real money.