Hi Deriv Community Members, 
Have you checked the account limits in your setting? Do not know how to check the information, no worries. We will guide you.
Please search to your Manage account setting and look for Account limits. We have stated the limits on your account and please be informed that the maximum cash limit for your account is 300,000.00 USD.
What is Cash limit ?
Represents the maximum amount of cash that you may hold in your account.
What to do if I reach the maximum cash limit ?
If the maximum is reached, you will be asked to withdraw funds.
We hope this information helps 
If you have any questions, please visit our Help Centre or contact us via Live Chat and WhatsApp.