According to the article, you keep $1,000 in a jar at home for a year while inflation runs at 3%. What happens to your money?

You still have $1,000, but it now buys roughly what $970 bought a year earlier

You still have $1,000, and its buying power is unchanged because the amount didn't move

You still have $1,000, but it now buys roughly what $970 bought a year earlier

You now have $1,030 because inflation adds value to idle cash

You lose $30 in physical cash, leaving $970 in the jar

📉 Inflation: Why Your Money Buys Less Over Time

Inflation is the gradual rise in the prices of goods and services over time. When prices go up, each dollar you hold buys a little less than it did before. This is why your grandparents talk about candy that cost a nickel — the candy didn't get more valuable, your money got weaker. Economists call this loss your declining purchasing power: the actual amount of stuff a dollar can buy.

A common yardstick is the inflation rate, often around 2–3% a year in normal times. That sounds tiny, but it compounds — just like the growth you saw in earlier cards, only working against you. At 3% inflation, something that costs $100 today costs about $103 next year, roughly $134 in ten years, and around $181 in twenty. Your salary and savings need to grow just to stand still.

This is the quiet danger of idle cash. Imagine you keep $1,000 under your mattress. In one year of 3% inflation, that same $1,000 buys what only about $970 would have bought before — you lost roughly $30 of real value without spending a cent. Money in a bank account earning 0% interest shrinks the same way in real terms (its value after subtracting inflation).

That's the core lesson: doing nothing with money is not safe — it's a slow leak. To preserve purchasing power, your money generally needs to earn a return at least equal to inflation, which is exactly why people invest rather than hoard cash.