Cheating works both ways, of course. While some people make a lot of money from tricks in physical casinos, these will not work online playing games like blackjack. Counting cards are not possible, as an example. Those playing a live casino are still going to struggle to keep track. A bet on a gambling site is always going to be a risk and you just have to take the cards you get.
Online blackjack is one of the most popular games to play on a casino site. It offers the same kind of rush as playing in a physical casino. Winnings can pile up quickly if you get on a good run. But the same is true for losing streaks too. When you are losing a game like online blackjack, do not be afraid to walk away. Chasing big losses is very rarely a good idea. And just like in any sort of gambling, never bet more money than you can afford to lose.