I think he got high on his own supply (both literally and figuratively). He was being praised and lauded by all of the most powerful people in the world for ye

I think he got high on his own supply (both literally and figuratively). He was being praised and lauded by all of the most powerful people in the world for years. People were throwing billions of dollars at him and telling him he was a genius who could do no wrong. Add in the fact that he is clearly a narcissist and sociopath of the highest order and you get SBF.