Reminds of movie 21. That’s the name of movie, just 21! The professor select bright MIT students who are capable of solving maths at an amazing skill sets and teaches them how to play the blackjack. These maths guys are so clever that they can calculate in their back of mind what type of card and pair is going to be their in the deck of card. They study the whole thing while playing the game and keep winning huge amounts of money.
They fly to Las Vegas and loot the Casino like hell man. All of that based on the maths calculation. I am not sure if this is possible with the online casino but if it is then they are rich.
Counting cards is in fact not so difficult but casinos are trained to spot it so in reality you will never be able to really loot the casino. It is also quite easy to spot as you will always raise your bet size whenever a good hand comes up and that will also draw the attention. But if you stop in time and move from casino to casino, you will still be able to win a nice amount of money!