Pretty interesting — even though clearly informational — piece by Quartz and Retroreport, titled the Future of Money. I found particularly striking the part about 'stone money' which I didn't know at all (https://en.wikipedia.org/wiki/Rai_stones). Now I see how many posts on Steemit are mentioning it already :)
Here's the complete series What Happens Next: https://qz.com/se/what-happens-next/1104608/bitcoin-blockchains-and-ethereum-ancient-stones-explain-moneys-future