First, turn money into bike parts or complete bikes.
Then swap some of the parts for the parts on the bikes.
Then sell the unused bike parts to create money.
Soon you will discover that you need the bike parts you recently sold and will pay a higher price to get new ones.
Having learned a valuable lesson, you will now buy more bike parts that you think you might need.
Eventually you will have more bike parts than you know what to do with (or know that you own, or where they are).
This is called…balance.