Hmmm. I'm imagining a science fiction story. A group of impoverished students hijack a spaceship and mine tons of gold (however much a spaceship can carry) from a gold planet. Then they divide it up in a lot of small pieces, and at about the same moment, sell the pieces at every coin and jewelry shop on Earth that buys gold. They use the money to buy diamonds, as a hedge against the money losing its value in case what they do crashes the economy, only to find out that diamonds have become worthless due to another group doing the exact same thing with the diamond planet and buying gold.

Too bad I'm not a writer.