Original: These serve a variety of purposes from simple gambling to price insurance... Oil Building on the infrastructure and credit and settlement networks established for food and precious metals, many such markets have proliferated drastically in the late 20th century.
Simplified: These serve a variety of purposes from simple gambling to price insurance. Oil and fiat Building on the infrastructure and credit and settlement networks established for food and precious metals, many such markets have proliferated drastically in the late 20th century.