Historically, over 10-year periods, the stock market (S&P 500) has shown potential for up to 20% annualized profit, and over 20 and 30-year periods, it has consistently been profitable with minimum returns of 8% over 30 years.
"over 10 years there's a lot of variables that could either leave you with a small loss or up to a 20% annualized profit over 20 years everything has so far been profitable with the worst ever return happening after the Great Depression and after 30 years the market historically hasn't returned less than 8%"