Just because they have a high trust rating doesn't mean that they are the best casino by the way. I need to clear that up, because people think that "the most trustworthy casino = best casino" and that is wrong. There is never any one "best casino" in the world. There are good ones and bad ones as we all know, bad ones may scam you. But, when we are talking about good ones like roobet, it is always a personal preference thing.
For a crypto Casino, the trust is pretty much the most important thing to consider though.
Most casinos have the same games and a good performance nowadays.
They might differ in transaction costs (for withdrawals) and bonuses/promotions but at the end of the day, you wanna know that you can withdraw your money without the casino trying to scam you. Therefore the most trusted casino with a good reputation could very well be considered the "best".
Gambling website users are ready to turn a blind eye to many things (not the best site design, not the most convenient interface, not the most withdrawals and not the lowest commissions), but pay full attention to the good reputation of this sites. For this directly affects the security of their funds, and hence peace of mind. The trust of its users, present and future, is the most valuable thing for any crypto casino. It is this trust that is their most valuable asset.