I'm surprised this article doesn't mention the lengths he went to hide his money using shell companies. Makes me question the "he regarded trading as a video game in which the object was to compile points not money" narrative. (on the flipside, if I ever get arrested for manipulating markets, I'm hiring this guy's lawyer)

Per the official criminal complaint document:

Around the time of the Flash Crash, SARAO took significant steps to protect his assets. In late April 2010, SARAO established a new entity, Nav Sarao Milking Markets Limited, which was incorporated in Nevis. SARAO appears to have created this company as part of a tax avoidance strategy pursuant to which he also established, in 2012, International Guarantee Corporation, incorporated in Anguilla.[1]

[1] https://www.justice.gov/sites/default/files/opa/press-releas...