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A Single Sheet of Paper and Warren Buffett’s Wealth

There is a famous story that if you fold a sheet of paper 42 times, it would be thick enough to reach from the Earth to the Moon.

At first, it sounds absurd. A single sheet of paper is incredibly thin. Hold it between your fingers, and you can barely feel its thickness. The idea that something so thin could reach the Moon simply by being folded a few dozen times feels less like common sense and more like a joke.

And yet, mathematically, the story is surprisingly accurate.

Let’s say a sheet of paper is about 0.1 millimeters thick. Fold it once, and it becomes 0.2 millimeters thick. Fold it twice, and it becomes 0.4 millimeters. Fold it three times, and it becomes 0.8 millimeters. So far, nothing feels especially impressive. Even after three folds, it is still less than a millimeter thick.

But the key is that this is not addition.

It is multiplication.

Each time you fold the paper, its thickness does not increase little by little. It doubles. At first, the change is so small that it barely registers. But at some point, the numbers begin to grow at a startling speed. After 10 folds, the paper is about 10 centimeters thick. After 20 folds, it is over 100 meters thick. After 30 folds, it is taller than a mountain. After 42 folds, it is thick enough to reach the Moon.

Warren Buffett’s wealth follows a similar pattern.

It is often said that more than 90 percent of Warren Buffett’s wealth was built after he turned 65. At first, this also sounds strange. Most people assume that wealth is built through intense effort in youth, then grows more slowly with age. But in Buffett’s case, most of his fortune accumulated in old age.

That does not mean he suddenly became an investing genius after 65.

The real reason is compound interest.

Compound Growth Starts Quietly, Then Explodes Late

The easiest way to understand compound interest is to compare it with simple interest.

Simple interest is interest earned only on the original principal. If you have 100 million won and earn a 10 percent return each year, you gain 10 million won every year. After one year, you have 110 million won. After two years, 120 million won. After three years, 130 million won.

Compound interest works differently.

With compounding, returns are earned not only on the original principal but also on the returns that have already been generated. If 100 million won earns 10 percent in the first year, it becomes 110 million won. The next year, the 10 percent return is not calculated on the original 100 million won, but on the full 110 million won. So after two years, you do not have 120 million won. You have 121 million won.

At first, the difference is small.

The gap between 120 million won under simple interest and 121 million won under compound interest is only 1 million won. That is why many people underestimate compounding. They may understand the math, but they do not feel its power intuitively.

But as time stretches out, the story changes.

Compounding becomes stronger the longer it continues. In the beginning, the interest is small, and the interest on that interest is also small. But over time, the gains begin to behave like principal. The money earned in the past starts earning more money, and that money begins earning money of its own.

When this structure repeats for long enough, the speed of wealth accumulation becomes visibly faster.

This is what makes compounding so powerful. In the early stages, it does not look dramatic. But given enough time, the result can become almost unreasonable. It is like folding a sheet of paper. For the first several folds, nothing much seems to happen. But after the 30th fold, the result begins to exceed imagination.

The explosive growth of Buffett’s wealth after age 65 follows the same principle.

Buffett Did Not Become Rich Late

There is one important point that should not be misunderstood.

When we say Warren Buffett built most of his wealth after 65, that does not mean he was poor when he was young. Buffett was interested in money and business from an early age, and he was already an exceptional investor when he was young. By the time he turned 65, he was already enormously wealthy.

The important point is that at 65, he already had a very large base of capital.

It is impressive when a small amount of money grows through compounding. But when a large amount of money compounds, the scale changes completely. Ten percent of 1 million won is 100,000 won. Ten percent of 100 million won is 10 million won. Ten percent of 10 billion won is 1 billion won. The rate of return is the same, but the actual amount of money being generated is entirely different.

Buffett spent decades building an enormous base of capital. Then he kept that capital tied to a powerful asset: Berkshire Hathaway. He did not constantly buy and sell in search of short-term profits. Instead, he allowed great businesses and assets to grow over time.

That patience created the time compounding needs.

Compounding is not simply a matter of finding a high-return investment. It is a matter of sustaining returns over time. Even a very high return will not create extraordinary results if it lasts only briefly. Conversely, a return that is not spectacular can create an enormous difference if it continues for decades.

The truly remarkable thing about Buffett’s story is not only that he made a lot of money.

What matters even more is that he stayed in the market for a very long time. He chose strong assets, held them for decades, avoided being shaken out along the way, and allowed time to work in his favor.

That is why Buffett’s wealth grew faster as he aged.

The younger Buffett earned money. But the older Buffett entered a different phase, where the money he had already earned began earning more money for him. At that point, the main engine of wealth creation was no longer labor. It was the asset itself.

The Real Lesson Is Staying Long Enough

The idea that 90 percent of Warren Buffett’s wealth was built after age 65 is not just an encouraging message that says, “You can still make money when you are old.” The real lesson is much more practical.

Compounding rewards those who stay with it the longest.

Most people understand the power of compounding in theory. But in real investing, they struggle to stay the course. When prices rise a little, they want to sell. When prices fall a little, they want to run away. When others seem to be making money faster, they become impatient. When the market shakes, they begin to doubt the plan they once believed in.

But compounding only works when you pass through those periods.

If you fold a sheet of paper only 10 times, it will never reach the Moon. Even 20 folds are not enough. Only after 30 folds, and then closer to 40, does the result finally begin to break common sense. Compound growth works the same way. If you cannot endure the dull early years, you never reach the explosive later stage.

That is why Buffett’s story is not merely a story about a rich man.

It is a story about time. It is about making a good choice, giving that choice enough time to grow, and resisting the urge to interrupt it too often. This is especially important in investing, but the same principle applies to many areas of life.

It applies to skill, writing, business, and relationships.

At first, nothing seems to be happening. The changes from one day to the next are too small to notice. Reading one more page today, writing one more paragraph, learning one more thing, or making one more careful decision will not transform your life overnight. But when those actions accumulate, the result eventually takes on a completely different shape.

Compounding is quiet.

In the beginning, it is slow enough to disappoint you. In the end, it is fast enough to astonish you. To believe in compounding is not merely to believe in a formula that makes money grow. It is to believe that small, almost invisible increments of time can eventually produce a result far larger than we can easily imagine.

A single sheet of paper is thin.

But if it keeps being folded, it can reach the Moon.

A small asset, a small habit, and a small decision may all seem insignificant at first. But if they are repeated long enough, if they are not interrupted too soon, and if they continue to build on top of themselves, they can eventually produce results on an entirely different scale.

That is what Warren Buffett’s wealth shows us.

Compounding is not magic. It is mathematics working so quietly, so patiently, and for so long that human intuition struggles to grasp its power.