How much money can be earned in the Stock Market?

You are limited by the amount of money you can invest in research you can do and all the luck you can get getting in at the right time and at the right time. No average income of someone who buys and sells stocks, is the Great American Lottery: buy tickets in the hope that small businesses 'success' and reap the benefits.  

You can invest as little or as much as you want, but like betting at a casino larger bets to get the biggest payouts.