>For example horse business going bankrupt while car business is booming.

But also the car business is far larger than the horse business ever was. It is not zero-sum; every time Henry Ford's factory spit out a new model T, real wealth was being created.

Money is just a standin for wealth. If we suddenly doubled the amount of wealth in the world, we could just print more dollars to match - or the existing dollars would just become worth twice as much.

This. Positive sum games are deflationary. Economic policy can, and has, offset the deflation of techno capital growth.