(Time) Money definitely doesn't grow on trees, but it might be growing in your bowels. If you're really healthy, you can sell your poop to sick people who need it for as much as $13,000 a year.
People who are infected with a bacteria called C. difficile need healthy fecal matter in their gut in order to survive — otherwise they need to be on constant antibiotic treatment. Some people with Crohn's disease also benefit from fecal transplants. So a company called Open Biome has been facilitating fecal transplants to patients in need, and paying healthy poopers a hefty sum for their services.