I know there are these kind of common sense answers, like:
- gold is the best material in atomic table to be currency
- it is universal demanded so it is the best stuff once a country own currency is at risk
- it is shiny so everyone loves it
- it is jewelry
but I don't think any of these reasons are as important as stuff like we need oil to turn on a tank or jet to have a war. Then why not country stores oil instead of gold? Does gold have any hidden ability may be even supernatural kind so every country fights for it? Muammar Gaddafi had so much gold but couldn't save his life.
Hello Gloria:
You said "Then why not country stores oil instead of gold?"
Previous posters have already given many of the good reasons why gold versus oil.
A short lesson on money summarizing why gold is the ideal form of money may make it more clear.
For a commodity to be used as money (medium of exchange) there are several requirements. All of which gold satisfies best.
1.
When bartering the two parties have to have a double coincidence of wants. Meaning both parties have to want what the other one has. So for example let’s say you have some lumber, that you want to barter for some thing else, we'll call it a horse. So you have to find some one who is willing to exchange their horse for your lumber. Finding this other party is not so easy when all you have is lumber and you want to buy a horse. Gold works much better as money since a lot more people are willing to trade some thing for gold than for lumber. Since gold is in heavy demand it overcomes the double coincidence of wants requirement of barter.
So for a commodity to be money it has to have a high demand in the market. So instead of bartering your lumber directly for a horse, you could get gold as a medium of exchange for your lumber and then use the gold you got to buy a horse.
2.
Second the commodity should be highly divisible, so that small chunks of other goods can be bought, and the size of purchases can be flexible. A house or a horse could be used as money but are not easily divided. Being easily divisible is also handy if you run a business because now you can compare the relative value of various goods and services and calculate your profit or loss.
3.
The commodity should be easily portable and have a high value per unit weight. Easily portable and a high value per unit weight means it is more convenient to use. In order to have a high value per unit weight the commodity must be in relatively scarce supply. This also means it can’t be created out of thin air like the central banks do with fiat currencies. Fiat currencies lose there value as the supply is increased by the central banks. So fiat currencies are a poor store of value long term.
Fiat currencies eventually become worthless. Where as gold has thousands of years of history of maintaining its value. For example a few hundred years ago during medieval times an ounce of gold could buy you a very nice suit of clothes. An ounce of gold today could still be used to buy you a nice set of clothes and then some.
4.
The commodity should be highly durable so that it can serve as a store of value for a long time. Oil has an expiration date as do many other commodities unlike gold.
Since gold satisfies all of the above requirements very well and oil does not, gold became and has remained a medium of exchange or money for thousands of years and this is the real reason why central banks store so much gold instead of oil. In short they are hedging against the collapse of the dollar a fiat currency, with gold.
For the source of this money lesson see the excellent book
The Mystery of Banking by Murray Rothbard
https://www.mises.org/library/mystery-banking-1