Yes, you can beat the casino. You just need to win big, and your winnings will surely exceed your entire lifetime investment. However, only a few achieve this.
But it's a very different thing for you to win a significant sum of money, and another to make the casino lose money. What generally happens in these cases is that you win the money others have lost, not the casino's.
Realistically speaking, nobody beats the casino. No matter how much you've won, there are always more player who loses.
Now, if your goal is to win big, then the chances are very slim to none. There is only one thing you can do to win big. Increase your betting amount, but that will bear a lot of risks, especially when that significant amount is something that you can't afford to lose.