But I can imagine how it happens. It is some massive fucking bull market and you see your peers doing shady things (20% APR! Zero risk!) and making shit loads of money. You've got this trading arm that is making shit loads of money during the bull market. So you do a little double dipping and it work! Hooray you are making everybody richer! So you do a little more. And a little more. And then oops Alameda is losing a lot of money. But don't worry this is just a blip. Those folks are smart. Hmmm... this is taking longer than we thought to come back. They just need some temporary money to get through this. Don't worry, they've still got huge assets. Oh fuck, their assets are tanking and they are still losing money. Kaboom.

You need to have somebody in the room who can say "yes I know this strategy is making money right now but we absolutely cannot do this." And it is already hard to have that person in the room normally, let alone when you are a company make up of people in their 20s who are told they can do no wrong and also believe that it is their moral duty to make a shit ton of money so they can funnel it into some weird effective altruism mission. If you believe you are saving the world then that 20th billion is still important, whereas if you just want to be rich as fuck then it really isn't.