It's not just about surviving a downtown and unforseen circumstances with some luck (like the sibling talking about FedEx barely making it). Tesla, for example, was famously extremely close to bankruptcy.

But SBF got into the situation he was in due to his egregious fraud. The accounting at FTX was a criminal joke, with multiple sets of books, bypassable controls, outright fake numbers. My guess is that if SBF had survived that particular BTC downturn that his extreme hubris and willingness to commit fraud would have eventually done him in - downturns always happen at some point, and his brazenness in his criminal enterprise showed no signs of learning from mistakes.

Sure, all hugely successful companies have a ton of luck involved. But I think it's a mistake to pretend that SBF was just done in by bad timing, or that all companies do what he did. His empire collapse was pretty inevitable IMO if you look at what a clown show FTX was under the covers.