The FED and their buddies are printing money again!! Guess what the stock markets do when the FED prints money!! You get magical stock market bull runs! Print money, buy stocks, stocks go up. What can go wrong?!
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It looks like you do understand how it works, huh?
What can go wrong? Well, many of things. But, paraphrasing Winston Churchill's words on democracy, capitalism is the worst economic system, except for all the others.
Maybe someday in the future, we'll come up with a better solution, by virtue of blockchain technology, for example. But for now we are bound to use this economic system for lack of anything better.