How much money can I make through Markets?

Well, the question is genuine but the question should be how can I make more money through markets because there's no limit on how much can you make here.

The market is like an ocean full of money, it's just that whether or not you know how to swim.

By swim I mean to say, are you able to handle the big guys having tons of advanced resources and high-tech assets, who are waiting to steal your money like innocent thieves.