Bitcoin Intro: The Why and History of Money

Money is not something a government invented and handed to you. It is a technology that markets discovered slowly, choosing the most saleable good available in each era, and it has been quietly replaced several times when a better one arrived. Understand that history and Bitcoin stops looking like an internet curiosity and starts looking like the next entry in a very old list. This is the piece I give first-time clients, before we talk price or custody, because everything else follows from what money actually is.

What money is actually for

Start with the problem money solves, because the properties fall out of it.

Before money there was barter, and barter has one fatal weakness that every economics lecture reaches for on day one. The farmer with surplus grain needs a new roof. The thatcher wants a goat. The farmer has no goat. Now three people have to want three different things in exactly the right amounts on exactly the same afternoon, and most of the time they do not, so the trade simply fails and everyone goes home poorer than they might have been. Economists call this the coincidence of wants, and it is not a minor friction. It is a wall. It caps how complex an economy can get, because past a certain point no chain of swaps can be assembled fast enough to matter. Money is the tool that breaks the wall. It is the one good everybody accepts not because they want it for itself but because they know the next person will accept it too, which means the thatcher takes it from the farmer today and hands it to the goat man next week without either trade needing the other to line up.

From that single job come the three functions you will see in any textbook. Money is a medium of exchange, the thing you pass across the counter. It is a unit of account, the ruler you price everything else against so a loaf and a haircut can be compared at all. And it is a store of value, the vessel that carries the work you did on Monday until you spend it in June.

The third function is the one that gets quietly broken, and it is the one most people never think to check.

A good store of value has to survive time without leaking. Carl Menger, writing on the origins of money in 1892, gave the underlying property its name: saleability, the ease with which a good exchanges for everything else across time, distance and quantity. The good that trades best, over the longest horizon and the widest range of sizes, wins the job. Nobody decreed gold into that role. Markets felt their way to it good by good, discarding each candidate the moment a better one appeared.

Why gold won and held for millennia

Cattle, salt, cowrie shells, glass beads, large limestone discs on a Pacific island: all of them have served as money somewhere, and all of them worked for exactly as long as they stayed hard to produce. That is the pattern to hold onto. Each of these monies collapsed at the moment somebody arrived with the technology to make more of it cheaply, at which point the people holding it handed their savings, trade by trade, to whoever held the new supply. African glass beads are the textbook case. They were scarce and precious in West Africa for generations, until European traders who could manufacture them by the barrel realised they could buy real goods with something that cost them almost nothing to produce.

Gold survived that test where everything else failed, and it survived it for one unglamorous reason.

It is genuinely hard to dig out of the ground, and no amount of wanting more of it changes that quickly. Gold does not rust or rot, so a coin buried for two thousand years comes out of the soil as good as the day it was struck. It melts and divides cleanly, so the same metal that settles a kingdom's debt also settles a day's wages. One ounce is identical to any other, which is what fungible means in practice. And crucially its supply grows at only about one and a half to two percent a year no matter how frantically the price rises, because the easy ore was mined out centuries ago. That last property, difficulty of production, was the whole discipline. It meant no king could conjure wealth by decree. He had to go and find it.

Gold ran into one real limit, and it is worth naming because Bitcoin was built to answer it. Metal is heavy and it is dangerous to move. So people started leaving the gold in a vault and carrying paper claims on it instead, and for a while the paper was as good as gold because it was redeemable for a fixed weight on demand. That worked precisely as long as the institution issuing the paper printed no more notes than it held metal. The anchor held the whole arrangement honest. Then the anchor was cut.

August 1971 and what it cost

After the Second World War the Bretton Woods system pegged the major currencies to the US dollar, and the dollar alone stayed redeemable for gold at thirty five dollars an ounce. Every rand in circulation therefore stood at a fixed if indirect distance from metal in a vault. The system had discipline built in, borrowed from the gold underneath it.

By the late 1960s the United States had issued far more dollars than it held gold to cover, spending on war abroad and programmes at home, and foreign governments began presenting their dollars and asking for the metal. On a Sunday evening in August 1971 Nixon went on television and closed the gold window, ending convertibility with no notice and no vote. The broadcast interrupted an episode of Bonanza.

That evening every currency on earth became a pure promise, backed by nothing more solid than the authority of the state that issued it and a law saying you must accept it. The committees that now managed those promises could expand the supply whenever the arithmetic or the politics demanded. Sometimes they behaved. In March 2020 several of the largest central banks stopped behaving all at once, and the money supply of the United States grew by more than forty percent in three years. Nobody was asked. I traced that whole slow drift, and what it does to a working person's savings, in what is actually happening to your savings.

The fiat problem, felt in rand

Once nothing constrains the supply, the purchasing power of the money falls over time. This is not a scandal that only bad governments produce. It is the ordinary, designed operation of a system with no ceiling on money creation, which is why central banks state an inflation target out loud rather than hide one. Aim for six percent a year and you are aiming, quite openly, for prices to roughly double every twelve years.

South Africans get to study this from the inside, which is a mixed privilege.

The rand has lost over seventy percent of its value against the dollar in the past twenty years. Put that in a kitchen. A George pensioner who kept a hundred thousand rand under a mattress in 2005 is holding the same numbers on the same notes today, but those notes buy a fraction of the groceries, the fuel and the medical cover they once did, and not one dramatic event caused it. The Reserve Bank has run a disciplined inflation-targeting framework since 2000, better than most emerging market peers, and even inside that framework consumer prices roughly doubled across recent decades. The system worked as advertised. That is the unsettling part. The leak is the design, not a failure of it.

So South Africans reach, instinctively, for the exits. Property in a good suburb. An offshore account if the annual allowance and the paperwork allow. Krugerrands in the ceiling, still, in plenty of families. The instinct is exactly right and the instruments each carry a catch: a house cannot be sold on a Tuesday afternoon, offshore access is rationed and reversible, and gold in a safe cannot cross a border or settle a small payment without a dealer in the middle. The rand's long decline, and why a scarce asset answers it, is the argument I set out in full in what rand weakness means for Bitcoin.

Where Bitcoin fits the old list

Bitcoin was engineered by studying what made gold money for five thousand years and then rebuilding those properties in a form a drill bit cannot dilute and a border cannot stop. Run it against the same checklist markets used to crown gold and it does not merely qualify. It scores higher on almost every line.

Scarcity first, because it is the property everything else depends on. There will only ever be 21 million coins. That number is not a target a governor announces and can quietly revise. It is a rule written into the software and enforced by every one of the tens of thousands of independent computers running the network, each of which rejects any block that tries to break it, automatically, with no committee to lobby and no emergency clause to invoke. Gold's scarcity rests on chemistry and the cost of digging. Bitcoin's rests on mathematics that thousands of strangers check continuously without needing to trust one another. New issuance halves roughly every four years and stops altogether around 2140, and more than ninety percent of all the coins that will ever exist have already been mined, which means the world has already met almost the entire supply it is ever going to see.

Divisibility is where gold struggled and Bitcoin walks it. A single coin splits into a hundred million units called satoshis, so the exact same instrument settles a hundred rand purchase and a hundred million rand one, no assayer and no saw required. You never need a whole coin to start.

Portability is the property gold traded away for its weight, and it is the one that changes daily life. Bitcoin moves to anyone on earth in minutes, with no bank in the chain, no correspondent institution taking a cut and clipping a day off the calendar, and no authority whose permission you must first request. A transfer between Johannesburg and London settles in about an hour at any size. Metal takes weeks of logistics and armoured trucks to do the same thing badly.

Then verifiability, which is the property gold and fiat never really had and the one I lean on hardest with clients. Anyone with an ordinary laptop can run the Bitcoin software, check the entire supply and confirm their own coins are genuine without asking a single institution for permission. Auditing a gold bar needs assay equipment and a specialist. Auditing a national currency is impossible even in principle, because the thing you would need to inspect is the future intentions of the people printing it. Gold in a vault asks you to trust a custodian. Bitcoin held in your own keys asks you to trust arithmetic and nothing else. If you want the plain-language version of what the thing actually is under the hood, I wrote what Bitcoin actually is for exactly that reader, and the deeper monetary case sits in Bitcoin as sound money.

There is a catch, and I would rather you hear it from me than discover it in a bad quarter. Bitcoin is young and it is volatile, and its unit-of-account job is the weakest of the three today because the price still swings hard while the market prices in what it is. That is why I hold it and help clients hold it on a five to ten year horizon, never as this month's rand substitute. The store-of-value case is a long game. Over that horizon, the thing that has mattered is not the swings but the one property no rand and no ounce can match: own a coin and you own a fixed twenty-one-millionth of everything there will ever be, this year and in a century, and nobody can issue you out of that share.