Until, of course, in 2013 the Silk Road was shut down by FBI agents and Mr Ulbricht, then 29 years old, was arrested in the science-fiction section of a San Francisco public library. In 2015, after a four-week trial,

On his second day back in office, President Donald Trump issued a full pardon to Ross Ulbricht, the founder of dark-web marketplace Silk Road. Trump had pledged to free Ulbricht as part of a raft of promises made to the cryptocurrency community while on the campaign trail.

Ulbricht, 40, was about 10 years into his life sentence for helming an online black market where drug dealers, money launderers, and traffickers used bitcoins to mask more than $214 million in illicit trades. (Ars thoroughly documented the Silk Road saga here .)