Spoiler: Not far. The Intergalactic Exchange Bureau used hard science to ruin fantasy vacations.
Simeoleons - The Sims 3
Ha ha ha ha! Those fools still haven't realized we're just creating money out of thin air with the "Kaching" cheat. Buy ALL THE THINGS!
Source: moneyinadvance.co.uk
Federation Credit - Star Trek
Use that extra 2.58 credits to tip your bellhop... or don't, because surely in the future everyone will make a living wage and be insulted by tip money, right?
Source: moneyinadvance.co.uk
Galactic Credit - Star Wars
A long time ago, in a galaxy far, far away... inflation was pretty damn reasonable despite the Trade Federation actively being dicks.
Source: moneyinadvance.co.uk
Bottle Caps - Fallout: New Vegas
Living the desert leads to parched people which leads more frequent use of Nuka Cola to quench that thirst which in turn leads to an economic downturn as caps flood the market.
Source: moneyinadvance.co.uk