Recently, I’ve been pondering an interesting question: the paper money we use every day actually has no real value, yet it is accepted worldwide. What is the logic behind this?

Speaking of which, the concept of fiat currency is not new. As early as the Song Dynasty in China (960-1279 AD), paper money appeared, replacing heavy metal coins with paper. It wasn’t until 1661 that Europe caught up with this trend. Before that, everyone used the gold standard—paper money had to be backed by gold and could be exchanged at any time. After World War I, this system gradually collapsed, and fiat currency became mainstream.

You might ask, since fiat currency isn’t backed by gold or other precious metals, where does its value come from? The core lies in three things: government authority, widespread usage, and public trust. Governments issue and guarantee its legitimacy through central banks. The more people use it, the more valuable it becomes. For example, the US dollar’s strength is because it’s accepted globally. As long as the public has confidence in the government and economic stability, the purchasing power of fiat currency can be maintained.

The advantages of fiat currency are obvious. First, it’s cheap to produce—just print paper, no need for rare metals. Second, it’s widely accepted worldwide, facilitating international transactions. Coins and paper money are also easy to carry and store. But the disadvantages are equally clear—without physical collateral, governments can print unlimited amounts, which can easily lead to inflation or even hyperinflation. Moreover, if the public loses confidence in fiat currency, its value can collapse instantly.

In contrast, cryptocurrencies follow a different path. Bitcoin and other digital assets are decentralized, with no government or central bank issuing or controlling them, and transactions are completely free. The value of fiat currency comes from trust and authority, while cryptocurrencies are determined by supply and demand. One is centralized and passively accepted; the other is decentralized and market-driven. This is also why more and more people are paying attention to digital assets.

Ultimately, fiat currency is the foundation of the current financial system, but its limitations are becoming increasingly apparent. Understanding how fiat currency works is very helpful for grasping the direction of financial markets, especially in understanding the fundamental differences between it and cryptocurrencies. If you’re interested in these topics, there are many related assets and tools worth paying attention to on Gate.