Bitcoin Basics · 1:33
What Is Money, Anyway?
What turns shells, gold or paper into money? In about 90 seconds, Steady explains the three jobs money does (trade, saving and measuring), what people have used for it over 3,000 years, and why it all rests on trust.
Numbers in this episode
- 3 jobs
- Trade (a medium of exchange), saving (a store of value) and measuring (a unit of account), as economists describe money.
- 3,000+ yrs
- Cowrie shells were used as money in China in the Shang and Zhou eras (about 1600–1000 BC), and in West Africa into the early 1900s.
- ~2,600 yrs
- The first coins were struck in Lydia, in today’s Turkey, in the 7th century BC from electrum, a natural mix of gold and silver.
- ~1,000 yrs
- Government paper money (jiaozi) began in Song-dynasty China in 1023–24.
- 1971
- The US closed the “gold window”: foreign governments could no longer exchange dollars for gold.
- ≈ 1 in 10
- Cash was $2.39 trillion of the $23.34 trillion US M2 money supply in August 2026 (Federal Reserve H.6).
- 2008–09
- Zimbabwe’s hyperinflation peaked in November 2008; in February 2009 the country stopped using its own dollar for foreign currencies, including the US dollar and the rand.
- IMF Finance & Development, “Back to Basics: Money” (the three jobs of money)
- W. S. Jevons, Money and the Mechanism of Exchange (1875)
- British Museum, cowrie shells, object C_1979-0228-17; Bin Yang, Cowrie Shells and Cowrie Money (2019)
- J. H. Kroll, The Coins of Sardis (Sardis Expedition)
- Jiaozi, early Chinese paper money (Wikipedia)
- Federal Reserve History, “Gold Convertibility Ends”
- Federal Reserve statistical release H.6, money stock, August 2026
- Johns Hopkins Magazine (2009) on Zimbabwe’s hyperinflation; CITE fact-check on Zimbabwe’s 2009 currency switch
Transcript
Read the narration
Imagine there's no money. Steady has a fish and needs shoes. But the shoemaker doesn't want fish. She wants bread.
Money fixes this. Steady sells the fish to anyone, then pays the shoemaker. Job one: trade.
Job two: saving. By Friday, the fish has gone bad. Money should still be worth something next month.
Job three: measuring. One shared unit, like dollars, lets you compare shoes, bread and fish at a glance.
People have hired many things for these jobs: cowrie shells in China over 3,000 years ago, then coins of gold and silver, about 2,600 years ago.
Paper money appeared in China about 1,000 years ago. But for centuries, a note was often a promise you could swap for gold or silver.
Today, the dollar's last official link to gold is gone. It ended in 1971. And only about 1 in 10 dollars is cash. The rest are numbers in bank accounts.
So what makes money work? Trust that others will accept it tomorrow. When that trust broke in Zimbabwe in 2008, people switched to other countries' money.
So remember: money does three jobs, trade, saving and measuring, and it runs on trust. Next: what if anyone could copy money? See you next episode!