Appears he was listed weeks before the crash in October:

https://web.archive.org/web/20221018125217/https://www.nytim...

FTX public crash started in November:

https://wikipedia.org/wiki/Bankruptcy_of_FTX

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EDIT: Another comment links to tweet by NYT & SBF both confirming he’s still “speaking” at the event, though who knows if he’ll actually be live and in person:

https://news.ycombinator.com/item?id=33743735