If you want to become rich and want to master, you must study Economics. For those who want to invest in this market, don't study economics, you won't have the knowledge to invest.
I know a lot about economics and all my studies and research I have done so far implies only one thing that is called rationality. The assumption of rationality implies that you know all about the market and the profits and losses. The assets that can replicate your wealth and those who have risk attached to it.
It basically tells you what to do and how to do it. We have so many concepts from both consumer and producer perspective so economics covers almost everything in the current world.