A liquid asset used in the settlement of transactions. Money itself functions as a medium of exchange for transactional purposes in an economy. Money can be many things, from commodities to fiat moneys to digital cryptocurrencies. It’s able to work due to the general acceptance of its value within an economy or foreign exchange. First established to replace a bartering-based economy, money may have perceived value or intrinsic value. In order to be most useful as a currency, money needs to be 1. fungible (ie, each piece is interchangeable), 2. durable, 3. portable, 4. recognizable, and 5. stable.