Because the stock market is controlled by international banking cartels.
Invest in profitable businesses or real estate instead.
Re: “The stock market is controlled by international banking cartels.”
Even if true, so what?
Since 1920, the SP 500 has an average return of 7% per year (adjusted for inflation - dividends reinvested).
For long term average investors, the USA stock market was the best and most accessible investment on planet Earth for the last 100 years!