[JackFr]

> The most saleable good (the most marketable and easy to sell) is usually the good available to them which scores highest on the following five properties (imagine a radar chart): Divisibility, Durability, Portability, Fungibility, Scarcity.

That's why you see certain agricultural products like grain and olive oil in the ancient Mediterranean serving in the role of currency prior to gold. While less durable than gold, these goods met all the other criteria and ultimately were useful as well. Gold comes on the seen when there is a significant economy-wide surplus of output.