Click one of the guides below to learn more about this new world of digital currency and how Athena can help. Depending on the type of machine, some Bitcoin ATMs may support two-way operation which allow you to exchange fiat money for bitcoin and vice versa. Verify your identity. Now 11 years later, the Bitcoin whitepaper remains the founding document that birthed the cryptocurrency revolution. As of writing, there are over Bitcoin ATMs scattered across the globe, an exponential rise from just 2 years back when the number hovered around Bitcoin Cash. Do you use a Bitcoin ATM?