It's wrong to cheat and mislead multiple people at once.
Nolan has a prank item idea - vanishing money you give to your friends and it vanishes on them.
Nolan wants to make some money with his invention.
Nolan sells his vanishing money as a novelty prank item.
"Nolan uses the vanishing money to ""buy"" things and mislead people to think he paid."
Nolan's fake money makes Nolan a lot of real money.
Lots of people think they just lost the money themselves.