A blockchain expert is accused of helping North Korea’s leaders. But what would they want from him?

A blockchain expert is accused of helping North Korea’s leaders. But what would they want from him?

Virgil Griffith must have known there was a chance that his decision to attend a cryptocurrency conference in North Korea was going to land him in trouble. Now he’s experiencing firsthand the heavy force of US sanctions against the country: he faces up to 20 years in prison.