I can take this worthless piece of paper, go to the supermarket, give it to a complete stranger whom I've never met before, and get, in exchange, real bananas which I can actually eat.
Puc agafar aquest paper sense valor, anar al supermercat, donar-lo a un complet desconegut a qui no havia vist abans i obtenir, a canvi, plàtans de veritat que puc menjar.