Marketplace®
Every story is an economic story
Season 10May 28, 2026

What if there was only one currency in the whole world?

And is it even possible?

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What if there was only one currency in the whole world?
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We’ve talked a lot about how money works and why countries have their own currencies here on “Million Bazillion.” But listener Alessio wants to know: Why DOESN’T the whole world use the same money? And could the world’s nations all decide to just use one shared currency? In this bonus mini-episode, we’ll get some answers!

Tips for grown-ups listening to “Million Bazillion” with kids

Money Talks

After listening to the episode, try out these related conversation starters with your kids:

  1. Ryan was wondering: If you could design money that the whole world would use, what would you put on it? Send us your answers here!

  2. Pick a country and look up its currency. What do you notice about the people, animals, or symbols printed on them?

  3. What are the different reasons that countries can share the same money?

  4. Why might a country want to keep its own currency instead of sharing one with others?

Tip Jar

For listeners who want to keep the learning going, start here:

  • Check out this “Million Bazillion” episode to learn more about why different countries have different currencies.

  • Listen to this episode to learn how currency exchanges work!

  • Curious about different currency symbols? Check out this list from Western Union.

Gimme 5

No money question is too big or small for “Million Bazillion!” And we’re looking for more to answer in future episodes. If you have questions you want answered, send them to us using this online form. And, thanks!

The Team

Thanks to our sponsors

NGPF

The Ranzetta Family Charitable Fund and Next Gen Personal Finance, supports Marketplace’s work to make younger audiences smarter about the economy. Next Gen Personal Finance is a non-profit that believes all students benefit from having a financial education before they cross the stage at high school graduation.

Sy Syms Foundation

The Sy Syms Foundation: Partnering with organizations and people working for a better and more just future since 1985.