Bitcoin's emergence as a global digital currency has been as revolutionary as it has been erratic. But while fledgling investors obsess over every fluctuation in the cryptocurrency market, nation-states are more interested in the underlying blockchain technology and its ability to revolutionize how business is done on the internet and beyond.

On Friday, the United States Attorney's Office for the Southern District of New York announced that Ethereum Foundation staff member Virgil Griffith was arrested. He faces charges of conspiracy following a trip to North Korea and a presentation at the Pyongyang Blockchain and Cryptocurrency Con...