The concept of money is kind of crazy when you think about it.
We're one of the only known species that have orchestrated complex social structures that are based solely on the acquisition of imaginary numbers of "wealth" - and that's been a human concept for a very long time. It started with territories, then resources, then those resources were represented with currency, and that currency changed into many shapes and forms over the years from stones, to metals, to a specific metal that's not really useful for anything except being particularly shiny, then paper, and now, digital numbers.
It's bananas that our entire worth as a member of our species is universally measured by a completely fabricated system of monetary rules (that are often broken) in order to gauge individual success. It really is insane.