Good summary is money has evolved in the past and continue to evolved to be better money. Each evolution is to fix the flaw of previous money. We went from barter > seashells etc > metallic coins> fiat backed by gold> now fiat only. Key is understanding the flaws of gold back fiat money and fiat money. Because bitcoin is intended to solve/fix this flaws Check out my short summary: https://buybtcretireearly.substack.com/p/chapter-2-what-is-money #bitcoin