Imaginary money? No, she doesn't really care anyway, but that is definitely one of the more absurd statements she's heard in a while. What's the point of the money, then?

But he seems eager to continue on, and she isn't interested in banking systems anyway so that all works out just fine.

"They might at first, but when it holds up to inspection they might realize you have something special. Or, bring home magic that can't be faked. If world domination is your goal, they won't laugh when you blow up a few heads, will they?"