There's a pretty convincing theory going around: Satoshi is a time-traveler who lived (lives? will live?) in a time where a Bitcoin-like system (possibly Bitcoin itself) is widespread. He "traveled" (is it actually "traveling" to "move" in time?) to a few years ago so he could own an exceptionally large number of bitcoins and sell a tiny amount in his current time. He alternately may have seen our time as being critical in mass surveillance and lack of freedom to transact, coming to our time to prevent utter domination by some type of oppressive whatever.

Unfortunately, I've forgotten too much of the plot to Discipline to know how similar they are. I know it has supernatural powers... chess... a handjob for drugs... .... Did he time-travel? The villain time-traveled, right?

Satoshi may also be an alien looking to observe what humans will do with this and how fast, to determine whether or not we're worth enslaving.