Would he have been allowed to attend if he wanted to? (I think you really need to have a process to filter out people like him.)

I agree it's not clear there's anything useful to be done, which is why I asked for a good plan.

If someone has a good plan for how to make good/useful things happen here, but requires funding for it, please contact me.

I recall feeling most worried about hacks resulting in loss of customer funds, including funds not lent out for margin trading. I was also worried about risky investments or trades resulting in depleting cash reservers that could be used to make up for hacking losses.

I don't think I ever generated the thought "customer monies need to be segregated, and they might not be", primarily because at the time I wasn't familiar with financial regulations. 

E.g. in 2023 I ran across an article written in ~2018 that commented an SIPC payout in a case of a broker co-mingling customer funds with an associated trading firm. If I had read that article in 2021, I would have probably suspected FTX of doing this.

Based on some of the follow-up questions, I decided to share this specific example of my thinking at the time (which didn't prevent me from losing some of my savings in the bankruptcy):

(See my edit)

A 10-15% annual risk of startup failure is not alarming, but a comparable risk of it losing customer funds is. Your comment prompted me to actually check my prediction logs, and I made the following edit to my original comment:

• predicting a 10% annual risk of FTX collapsing with FTX investors and the Future Fund (though not customers) FTX investors, the Future Fund, and possibly customers losing all of their money, 
  • [edit: I checked my prediction logs and I actually did predict a 10% annual risk of loss of customer funds in November 2021, though I lowered that to 5% in March 2022. Note that I predicted hacks and investment losses, but not fraud.]

I don't think so, because:

• A 10–15% annual risk was predicted by a bunch of people up until late 2021, but I'm not aware of anyone believing that in late 2022, and Will points out that Metaculus was predicting ~1.3% at the time. I personally updated downwards on the risk because 1) crypto markets crashed, but FTX didn't, which seems like a positive sign, 2) Sequoia invested, 3) they got a GAAP audit.
• I don't think there was a great implementation of the trade. Shorting FTT on Binance was probably a decent way to do it, but holding funds on Binance for that purpose is risky and costly in itself.

That said, I'm aware that some people (not including myself) closely monitored the balance sheet issue and subsequent FTT liquidations, and withdrew their full balances a couple days before the collapse.

I agree it's probably a pretty bad idea but I don't think this supports your conclusion that "the EA community may have hard a hard time seeing through tech hype"

• Going even further on legibly acting in accordance with common-sense virtues than one would otherwise, because onlookers will be more sceptical of people associated with EA than they were before. 
  • Here’s an analogy I’ve found helpful. Suppose it’s a 30mph zone, where almost everyone in fact drives at 35mph. If you’re an EA, how fast should you drive?  Maybe before it was ok to go at 35, in line with prevailing norms. Now I think we should go at 30.

Wanting to push back against this a little bit:

• The big issue here is that SBF was recklessly racing ahead at 60mph, and EAs who saw that didn't prevent him from doing so. So, I think the main lesson here is that EAs should learn to become strict enforcers of 35mph speed limits among their collaborators, which requires courage and skill in speaking out, rather than being highly strictly law-abiding.
• The vast majority of EAs were/are reasonably law-abiding and careful (going at 35mph) and it seems perfectly fine for them to continue the same way. Extra trustworthiness signalling is helpful insofar as the world distrusts EAs due to what happened at FTX, but this effect is probably not huge.
• EAs will get less done, be worse collaborators, and lose out on entrepreneurial talent if they become overly cautious. A non-zero level of naughtiness is often desirable, though this is highly domain-dependent.