Simulation of free market

rules:

• Everyone starts with 5$ cash
• Anyone can trade with others (chosen randomly)
• 50 / 50 chance of winning in trade
• Luckier person gets +1 and other lose -1
• If someone reaches 0$ they cant trade anymore
• No more trading = collapse of economy

Summary:

Even in the absoultely fair and free market like this, all the money will eventually endup in one person hand. Which means the collapse of the economy.