What is money, really?

📘 In Brief At its core, money is not a thing but a social agreement. It is a promise accepted by all parties involved because they trust that others will accept it as well. This trust replaces the direct exchange of goods and services, which would be cumbersome and inefficient without money. Specifically, money fulfills three functions: it is a medium of exchange, a unit of account, and a store of value. As a medium of exchange, it solves the problem of the double coincidence of wants – you no longer have to find someone who wants exactly what you are offering. As a unit of account, it gives all things a comparable price, allowing us to express values in numbers. As a store of value, it enables purchasing power to be saved for the future, rather than hoarding perishable goods. The actual value of money therefore lies not in the material (paper, metal, or digital bits) but in the collective fiction that it will be worth as much tomorrow as it is today. This fiction is maintained through government guarantees, laws, and the stability of the economic system. When this trust breaks down, as in hyperinflation, money becomes worthless – it was never more than a story we tell ourselves collectively. 🔍 Why This Matters Money is not a thing but a social relationship: a collectively binding fiction that enables exchange, value measurement, and value storage. Historically, it emerged from debt relationships, not from barter – at its core, it is a promise backed by trust in the stability of a community or a state. Modern forms of money (book money, central bank money, crypto assets) are pure information: they …