How to pay for Biki?

Hello there, I'm curious about the process of paying for Biki. Can you guide me through the steps? I understand it's a cryptocurrency platform, so does that mean I have to use a specific digital currency to make payments? Or are there other options available? Also, are there any fees involved in the payment process? Lastly, can you tell me about the security measures in place to ensure the safety of my transactions? I'd appreciate your insights on these questions.