it's what's being DONE with money in general.
It is helpful to consider money to be a tool. In modern civilization, money is an extremely convenient medium of exchange, and it established thriving markets all over the world.
But whenever people start hoarding money, above and beyond whatever they are using and recirculating, it effectively disappears and disrupts the markets.
Then, either there are shortages and hardships or additional money must be "found" or "created" - use your imagination for the myriad ways that can happen.
I visualize the money scenario as like a river flowing down out of the mountains and providing water for all the farms along the way. If someone at a higher elevation "owns" the land that the river flows through and builds a dam to impound the water - everyone downstream will be shorted.
The question is whether "owning" the land allows you to "own" the water that passes through it, and/or what does "owning" actually mean?
To me, the native Americans had it right - when Europeans asked to "buy" the land, the Indians said "We belong to the land, the land does not belong to us."