Bitcoin, to the right;

Fiat, to the left.

In a fiat world, the money supply is typically expanded by increasing the amount of currency in circulation. Central banks can do this by printing more paper money or by creating more digital currency through monetary policy measures such as quantitative easing. When more currency is added to circulation, the value of each individual unit of currency decreases, which is why we have to add more zeros before the decimal point to represent the same value. On the other hand, Bitcoin has a fixed supply of 21 million coins. As demand for Bitcoin increases and its value rises, people tend to buy and sell smaller fractions of Bitcoin rather than whole units. In other words, the value of Bitcoin is divided into smaller and smaller fractions, which are represented by decimal places to the right of the decimal point. As Bitcoin becomes more valuable, we need to add more decimal places to represent smaller fractions of its value. For example, if the value of Bitcoin is $10,000, then 0.001 Bitcoin would be worth $10. If the value of Bitcoin increased to $100,000, then 0.001 Bitcoin would be worth $100 - the same fraction of Bitcoin, but worth more in dollar terms. This is why Bitcoin can be considered a deflationary currency, as its value tends to increase over time, while the supply remains fixed.