This book begins with the final legal showdown with Zuckerberg. The twins emerge with a $65m settlement — not pocket change, but still a pittance compared with the wealth Facebook has generated. They put some of the money to good use. Cameron and Tyler were early to bitcoin. Starting in 2011 they bought up 1 per cent of all the bitcoin in circulation for a total of $11m. By late 2017, with the price of the cryptocurrency surging past $10,000, they were worth a combined $2bn, making them the billionaires of the title.

https://www.ft.com/content/fad513ec-81f9-11e9-b592-5fe435b57a3b