What is the payment method for CoinFlip?

Excuse me, could you please clarify the payment method for CoinFlip? Is it a specific cryptocurrency that needs to be used, or are there multiple options available? Are there any fees associated with using certain payment methods, and if so, how are they calculated? Additionally, is there a limit to the amount of funds that can be transacted through each payment method, and are there any security measures in place to protect against fraud or unauthorized transactions? I would appreciate it if you could provide a comprehensive overview of the payment process for CoinFlip.