Investment doesn't make you rich, revenue is. Investment is really overrated recently, many people are selling the dream to get rich from investment, while getting rich through investment is nothing different to luck. To get rich, you need to be hard worker, focus on one thing and being consistent, but most people fail, that's why didn't make a lot money.
Investing in Bitcoin for 4 years only make your capital double or triple, if you only have small amount of money, you won't earn much.
It's really difficult to comprehend what you are saying because I'm wondering what will make one rich if investment will not do the magic. Besides, investment is not only money, it can be in the form of time and other resources and anything that you give something to get some reward is investment. Some of the world's richest people actually invested money into businesses or other peoples ideas and that changed their lives. We should never underrate the power of investing. I think the post was about someone saying that gambling is not a great way to make money whereas investment in stocks, shares and other tangible assets is, and that the rich think in the direction of the later whereas the poor think in the direction of quick money from gambling.
In this context, investments are only limited to "investment banks, equity firms and asset management companies" those are people who already rich, not from someone who born poor and want to get rich.
Investment banks, you need to become priority member.
Equity firms, you want to take a loan to start business and you need valid collateral.
Asset management companies, for rich people who don't have time to manage their money.
If you don't understand what I'm saying, then I will illustrate it.
Let's say Bob make $1 Million per month, he save 50% of his money which is $500K in banks and not want to invest.
While Eve make $1,000 per month, she always consistently invest $800 in Bitcoin.
Now, do you think which one is richer? Bob or Eve.