This is entirely up to you! You can certainly keep cryptocurrency, or fiat, or both, on the app. Maintaining a balance on your account will allow you to buy and sell 24/7 through the app without delay. If you wish to withdraw your cryptocurrency balance, you may send it to an external wallet of your choice. If you would like to cash out your dollar balance, please submit a cash out request via the app by going to "withdraw" and then "withdraw fiat" and our team will process your request!