I don't really focus too much on RTP and RNG related stuff since reputation of a casino(FIAT or Crypto) matters more to me in comparison. If a casino has a solid reputation, I deposit and gamble away.
If it has a bad reputation, I avoid it like the plague. I have never been scammed so far thanks to researching the reputation of whichever casinos that I played in thoroughly.
That is the way I think as well, I can understand that people are always looking for the best odds on their bets, bonuses, cashback and anything that gives them a slightly higher chance of winning, as even if we gamble for fun at the end of the day we want to win even if we know that over the long term this is not possible, however by far the most important characteristic that a casino must have is to be trustworthy, because even if the casino does not offer the best bonuses you know you will be able to withdraw your remaining capital without a problem.