Except for a lucky few (who get all the attention as if they've cracked a secret code to producing wealth),
no one really gets rich from investing.
There are two ways to get rich: (1) be smart and work your tail off, or (2) get lucky.
Path #1 involves a bit of #2, but not as much as some people might believe. Also, "working hard" doesn't mean going to work and putting in a lot of time/effort day after day; it has more to do with constantly seeking to improve skills that are of value to the world, expanding your network, and doing more with less.
That last bit is important: too many people do improve their earning potential significantly over time, but never feel "rich" because they imperceptibly scale their lifestyle and spending patterns to match (or surpass) their increased earnings.
At the end of the day, investing should be regarded as a way to simply stretch the money you do make farther (on a long-term scale). That's not to say it can't significantly contribute to one's wealth over time, but without extraordinary luck, investment returns are usually more of a slow and steady multiplier to your own earnings.
If you're investing to become rich, you might as well play the lottery.