One of the primary benefits of money is that you don't have to know your customer. Money's secret sauce: anonymity at scale. No customer dossiers needed. Pre-coin era? Trade jerky for future grain, stare into their soul, gauge if they'll ghost you when blight hits. (Spoiler: they might.) With money, all this disappears. Meat<->money, exchanging names and life stories becomes an optional pleasantry. Now compare with current KYC-madness.