To sell bitcoin, follow these steps:
Click on the circle with the plus ( + ) sign at the bottom center of the navigation bar.
Select 'Sell'.
Enter the amount you want to sell.
Go to the next step and enter the bank details of your bank account where you wish to receive your money.
Click on the button 'Transaction preview'.
(Optional) Add a referral code to save 0.1 % on fees.
Click on the 'Sell now' button to confirm the sell order.
Please note that it may take 1–3 business days for the fiat money from your BTC sell order to be credited to your bank account.