Money on Mars

Colonies trading on Mars are going to use water as money.

No, I don’t mean that they will be going around with bottles of water, pouring water to pay for things. That would be really silly and impractical. So what exactly do I mean?

The Case for Water

Before I answer that I’ll like to make the case for why water makes for an excellent choice as money on Mars, Venus or possibly the Moon.

  • Food production
  • Drinking
  • Oxygen for breathing
  • Fuel production

What Does Water Money Look Like?

Nobody is going to mint coins of water or carry around water bottles to make payments. But how will they then use money to pay for things?

Final Words

I’d love to hear your thoughts on this, whether you have better suggestions for money, or flaws you see in my reasoning. I have considered alternative money. One obvious candidate was metals as those would likely be quite rare and expensive on early colonies since they would lack the equipment to refine and process metals themselves.



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Erik Engheim

Erik Engheim

Geek dad, living in Oslo, Norway with passion for UX, Julia programming, science, teaching, reading and writing.