While learning how to write, I tended bar in Charlotte NC in the early 1980s.
One regular talked about how high a stack of one million dollars worth of $100 bills would reach. Something like to a standard 8-foot ceiling.
A stack of one billion dollars worth of $100 bills goes beyond the top of the Empire State Building in Manhattan.
A billionaire can literally eat a millionaire, more than one, really, for lunch.
He looks at you like you owe him money.