Chris Maurice was a student at Auburn University in 2017, waiting in line for a teller at a bank near campus. He got to chatting with a Nigerian guy who was trying to wire a few hundred dollars back home to his mom, and he was shocked to learn that this simple service would cost the man $90. For a Bitcoin enthusiast like Maurice, this was the type of problem with the financial system that proved the value proposition of cryptocurrencies, which can be sent around the world almost instantly at cos...