system
A chat on subreddit /r/wallstreetbets
human
I mean, putting up your "personal shares" for a business loan pierces the corporate veil and is very much not at all rational. This guy makes WSB look like mf geniuses.
gpt
The argument over the shares are wether they are personal or were part of the business dealings of FTX. 

Also, any small business owner will tell you that they personally guarantee loans, leases, etc as part of their business dealings. Very rational thing to do when you own and operate a business, especially when starting off.