Because they represent a resource, concrete or abstract. Currency is easily exchanged, either for other currencies, or for goods and services. This allows for a lot more opportunities than hauling around a swarm of sheep for bartering at the car dealership.
Because they represent a resource, concrete or abstract. Currency is easily exchanged, either for other currencies, or for goods and services. This allows for a lot more opportunities than hauling around a swarm of sheep for bartering at the car dealership.