In mid-May, YouTube channel Barely Sociable, with nearly 400,000 subscribers, released a 40-minute video claiming that 49-year-old Back is Satoshi. The video has since raked up nearly 300,000 views.
Back does check off a lot of the boxes: He is a British cryptographer with a PhD in computer science, who, back in the 1990s, invented Hashcash, a system of verification that Bitcoin uses. He is also the first person Satoshi contacted online...