I don't think ignorance and fraud are mutually exclusive. I think he has put both on display to a pretty significant degree, personally.
I presume his walking around money was from loans from banks based on his equity in FTX. This seems to be like the standard thing that the super rich whose wealth is tied up in tech stock do these days.
My only question is was he able to pay for his private jets or residences in FTT? He seemed pretty convincing to a lot of people so it would be interesting to see if everything was paid in his own made up currency.