U.S. paper money is not actually paper: It’s 75 percent cotton and 25 percent linen. With a lifespan of about 4.5 years, the $10 bill is the shortest-living note in US monetary circulation. The longest-living note, the $100 bill, lasts about 15 years. It takes about 4,000 double folds (first forward and then backward) before a bill will tear.
Money is a form of time travel. It is a technology for transferring value across time, and you can use it to transfer between the two most important people in your life: You, and the vaguely you-like person you’ll become in 10, 20 or 60 years. Check out the article "How a ‘self-nudge’ could help you make better money and life decisions".
»Money is like gas durin a road trip. You don't want to run out of gas on your trip, but you're not doing a tour of gas stations«