F. Scott Fitzgerald is very romantic, but unrealistic - many, many of the rich are for more resourceful than Fitzgerald ever imagined. And they are ruthless, in a way you won't understand until it is too late. Don't underestimate the rich.
Kruggerands, jewelry, dollars, euros, whisky and a .45. That's an ideal carry-on for the rich. The numbered Swiss bank accounts, those are for your memory or keeping outside your BOB. For reciting when the border guard has his gun trained on you ready to kill you, in hopes that he might not, wanting the ransom, in addition to your Kruggerands. Because the poor always want more. As do the rich. They understand. The whisky is also useful, after a few drinks perhaps the guard doesn't want to kill you, in preservation of his soul, if he has one.