To sell and buy Bitcoin on Cash App, you don't need of Cash App Bitcoin wallet address. Also, you can send Bitcoin from Cash App to any other Bitcoin wallet. But, be informed that you can’t receive Bitcoin on Cash App from any other BTC wallet. Why? Because there is no such thing as Cash App Bitcoin wallet address. With that being said, Cash App has no its own Bitcoin wallet address. Users also need to go through the verification process to enable the Cash App Bitcoin withdrawal.