What is a Bitcoin ATM franchise?

As a cryptocurrency enthusiast, I'm curious to understand the concept of a Bitcoin ATM franchise. Could you elaborate on what it entails? Specifically, I'm interested in knowing how such a franchise operates, the requirements for becoming a franchisee, the potential revenue streams, and any unique challenges or opportunities that come with managing a Bitcoin ATM business. Furthermore, I'd like to understand if there are any regulatory considerations or compliance measures that need to be taken into account. Your insights would greatly help me in assessing the feasibility of investing in such a franchise.