From Szabo’s critically-important exploration of collectibles:
At the extreme upper left-hand corner is modern money – used purely as a medium of exchange and obligation satisfaction, and with high velocity, typically several transactions per month. The predominant such media in a culture also usually becomes its of account. At the opposite (southeast) extreme are pure stores of value – seldom if ever alienated, they usually change ownership only at death. At the northeast extreme are pure collectibles – a low-velocity (a few to a few dozen transfers per human lifetime) medium of obligation satisfaction and exchange, but also a store and display of wealth. At the southwest extremely are immediate consumables, such as food obtained from foraging in cultures that do not preserve or store their food.