Due to people, the exchange of goods occurred through social relationships. There were also traders who bartered in the marketplaces. People still consume more and more but they cannot afford the debts because they spend money more than they can get so that make currency problem. The growth of economic & business persuades the investors to do stock. When investors pay for stock, a lot of money comes into the marketplaces, company and government can use them to do many things so this is benefit to the country.