How does Bitbank work?

Could you please explain how Bitbank operates and what makes it stand out in the world of cryptocurrency exchanges? Specifically, how does it facilitate buying, selling, and trading of digital currencies? Also, are there any unique features or services that Bitbank offers to its users? I'm curious about the platform's security measures and how it ensures the safety of its clients' funds. Additionally, could you provide some insights into the fees associated with using Bitbank and the payment methods it supports?