Money

What makes an object or ledger entry money, how it solves barter frictions, and why trust is its true foundation.

What is money?

Money is anything that is universally accepted as payment for goods and services, or in the settlement of debts. It is not necessarily gold, silver, or paper; it is fundamentally an accounting system based on social trust.

The three functions of money

• Medium of exchange — It eliminates the double coincidence of wants by being accepted by everyone in trade.
• Unit of account — It provides a common measurement scale so that the price and value of completely different goods can be directly compared.
• Store of value — It allows people to save purchasing power earned today and spend it weeks, months, or years later.

Topics

• Plastic Money — Debit and credit payment cards, magnetic stripes, and authorization networks.
• Digital Money — Electronic ledgers, real-time payment rails (UPI), CBDCs, and cryptocurrencies.
• Inflation — How the sustained rise in prices erodes currency purchasing power.
• Exchange Rate — Why currencies differ in value, forex markets, and trade balances.

Ai disclosure: written with the help of AI (ChatGPT). You are encouraged to point out errors and omissions.