21Dukes offers you various deposit and withdrawal methods that will make your online transactions faster, easier and safer. The casino also guarantees your privacy and no gaming related content will appear on any of your financial statements. 21Dukes Casino accepts the cryptocurrency Bitcoin. There are many advantages to using bitcoin, including that it can be transferred, securely, quickly, safely and anonymously, by anyone from one end of the world to another. If you prefer to not use bitcoin then you can use Visa or MasterCard or an e-wallet. The processing time for all options is instant but there may be a fee associated with it.