Users that have not passed KYC will not be able to initiate withdrawals.
Users that have passed KYC can withdraw up to 100 BTC per day.
If you navigate to the Fees page from the user drop down menu you will see a meter that will display the amount that you have already withdrawn for that day.
If you wish to increase your withdrawal limit beyond the 100 BTC limit per day, submit a request via a customer support ticket and a team member will reach out.