Be a medieval peasant.

Harvest comes in

Load 1,000 pounds of produce onto a mule

Mule dies

Throw mule and produce on shoulders

Walk to market

Set up stall

Sign: "Apples - 1 gold piece"

Sell a single apple

Am now the wealthiest man in town

Go across the street to buy a wool tunic

Attempt to make change

Merchant cannot make change for a single gold piece

So he kills me and becomes wealthiest man in town

Repeat this for every shop in town

Literally one guy left in village

Mongols show up

Take gold piece

Return to China

China countries to be the wealthiest country on Earth for another century