Earlier quoted context omitted.
Sounds like he forgot about the principle of diminishing returns. If you have $1B to your name, it's stupid to put it all on red, even if your expected return is positive.
Diminishing returns don't apply for SBF - his life's goal is to fund effective altruist charities, so each billion is as valuable as the last as long as there are good projects to fund. I don't think people are comprehending how tragic this whole situation is (acknowledging that it's SBF's fault). This collapse put the brakes on a powerful force for good, and lives that would have been saved won't anymore.
Let's be honest: we don't know what his life goals are. He said that his goal is to fund charities, but that's a pretty common thing for wealthy people in the U.S. to say because saying so gives you a lot of social status at no cost. Very few people actually proceed with any plans of significant charitable donations.