Imagine that I'm offering a bet that costs 1 dollar to accept. The prize is X + 5 dollars, and the odds of winning are 1 in X. Accepting this bet, therefore, has an expected value of 5 dollars a positive expected value, and offering it has an expected value of -5 dollars. It seems like a good idea to accept the bet, and a bad idea for me to offer it, for any reasonably sized value of X.
Does this still hold for unreasonably sized values of X? Specifically, what if I make X really, really, big? If X is big enough, I can reasonably assume that, basically, nobody's ever going to win. I could offer a bet with odds of 1 in 10100 once every second until the Sun goes out, and still expect, with near certainty, that I'll never have to make good on my promise to pay. So I can offer the bet without caring about its negative expected value, and take free money from all the expected value maximizers out there.
What's wrong with this picture?
See also: Taleb Distribution, Nick Bostrom's version of Pascal's Mugging
(Now, in the real world, I obviously don't have 10100 +5 dollars to cover my end of the bet, but does that really matter?)
Edit: I should have actually done the math. :(
"10^100 dollars is like a promise to make one plus one equal three."
It's more like a promise to dilute the value-to-money ratio by a factor of 10^80. Even if that much money could be printed, all that would be accomplished would be to put all the world's wealth in one person's hands and reduce everyone else to beggars.
The correct response to the question is, of course, to lynch the person threatening to print/mint that much excess money as a danger to the well-being of human civilization. Even if you aren't a fan of human civilization, such a procedure is quite likely to damage everything else on the planet in the process of humanity's destruction.