Because a store of value is a theoretical construct that is never actually realized. There is no such thing as a perfect store of value. Luxury goods and stat

Because a store of value is a theoretical construct that is never actually realized. There is no such thing as a perfect store of value. Luxury goods and status objects can go out of vogue. Foods spoil. Houses need constant maintenance. Land's value can shift based on regional demand or even be destroyed by changes in climate - too much water, too little water. Currencies can fail and even personal favors fade over time.