TL;DRThe circular flow of income model is developed to understand how money is exchanged between participants in an economy. Participants are classified into 5 sectors: Households, Firms, Government, Foreign, and Financial.Economic health can be gauged by the calculation of GDP. GDP increase indicates economic growth and is achieved when total injection exceeds total leakage.We can extrapolate from the model to inform the design of a sustainable crypto economy:Separate player motivations into...