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Have you had any thoughts on a metric similar to GDP for the Steem economy?
sales and purchases of coins are slightly hidden in that they appear as any transfer, except to a known exchanger's account; there isn't a "sale" transaction as such. Which also means that STEEM is never really sold outside of the economy.

If I had been an economist, it would definitely be an interesting topic! :-)
But I'm just a "blockchain guy" with an amateurish interest in economics