I don't see how can there be further secret to it. It's a gamble on whether you win or lose and the odds are always in favor of the house. No amount of superstition or mumbo jumbo that you do will change those percentages of winning, especially with online gambling games that involve crypto.
If you're playing poker and counting cards i could see how you could use that to your advantage if you're smart (genius) enough, but other than that, it's all the same. Just play!
That's because there's no such thing as a secret in gambling that can make a gambler win all the time. Gambling is created to benefit not the gamblers but the owners and the more you spend time playing and gambling the closer you'll get to the house edge and once your near the house edge then it'll be very hard to win anymore. In gambling you have to be wise and have self control to avoid losing more.
You are right when you say that casinos win first of all in gambling. Because this is their business, so the chances of winning are higher. However, there are games where a lot depends on the player, such as most card games. In them, with the help of mathematical skills and a good memory, you can win in most cases. Casino calculate these people, and forbid them not, to come.