If I had to guess, I'd say it's actually clearly correlated. The same underlying ego could've driven both the ambition and rewards he got at Google (after lots of rule-bending) and the brazen theft.
This. You see this behavior in gamblers who make it big and then lose it big, or in revenge trading. Make a lot of money then lose a lot of money. If you are even luckier you might even be net positive at the end.
People who know when to quit will usually not have made that much money in the first place because it's a different personality type almost.
