Update: Wow, I just finished reading the book (belatedly) after re-picking it up a few days ago. There's a stunning conclusion that makes sense. The founder of bitcoin may have been Hal Finney, a cryptographer who froze himself in death and may be saving the founder's stash for the future!

"... and expected someone to seize the moment, but 'there was a weird silence. For some reason, no one says anything.'
Ryan raised his hand. 'I'll get you lunch.'
'I'm going with this guy,' Dorian said."

A key moment: "Suddenly, the door opened, and an unassuming-looking, slightly disheveled man stepped out. The reporters rushed forward, surrounding him in a scrum and barking questions. 'Okay, no questions right now,' Dorian Nakamoto said. 'I want my free lunch.' Ryan was at the back of the pack ...