Thanks for the links! I might sleep over the shemitah stuff though lol (not big on numerological stuff). And for what it's worth, I think currencies are not what we think they are (or what the ancients think) and it's still being defined by emerging coins and use-cases. There was an interesting write by @itchykitten (The Myth of Barter) which I thought was interesting as well.

Thanks again, gonna read them tonight :)