What is the average revenue per user in the cryptocurrency market?
In the ever-evolving landscape of cryptocurrency and finance, a crucial metric that investors and analysts alike scrutinize is the average revenue per user, often abbreviated as ARPU. Could you elaborate on what this metric entails in the context of the cryptocurrency market? Specifically, how is it calculated? What are the key factors that influence its fluctuation? And, ultimately, how does it serve as a barometer for assessing the profitability and sustainability of various cryptocurrency businesses and platforms? Your insights would be invaluable in navigating this dynamic market.