Economy and stock market

Addition of a universal currency and an advanced supply & demand system for external (and possibly internal) trading.
I believe this could give alternate goals and motivations to players, setting up mass exportation of individual products, mass mining, forestry or farming could be a focus for players.
This would add thousands of new strategies, drastically improving long term playability, possibly more so than any other individual update.
This could also open countless doors for later additions such as Loans, education, democracy, unions, wages, well fare etc.
Notes:
My apologies if this is already on the road map, or has been previously suggested. I checked both the road map and forum and I couldn't see any mention.
Many thanks to the devs for keeping in touch with the community!