For example: lets presume you are correct and one BTC could run an entire economy. Then how could BTC be a better system with just 15,000 people owning 8,793,200 BTC. How is this going to improve society?
Because Bitcoin is not controlled by a central entity that gets to award those closest to that central entity and punishes those furthest away from that central entity.
We are all on equal footing with equal access to Bitcoin. If you are not buying bitcoins right now, you have nothing to complain about. If you thought it was too risky the first time you heard about it and did not buy, you have nothing to complain about. If you have not been involved in your world that includes Bitcoin and just skate through life hoping for something better but not doing anything about it, you have nothing to complain about.
Those that work and take risk are being rewarded. Those people are improving society. Enjoy your diminished wealth if you are not one of them.