I think this kind of game have a very small chance of winning. And I don't think that this is really secured because they don't need KYC so in short they are no concern whatever what happened on your investment. I hope they can improve their features specially in terms of security.
It is indeed not good for a site with not being a secured site as you might lose your money because of it but I hope they will make it secured enough to make people feel safe using their site and having more people will play on their site even if they don't have KYC because not all secured site have KYC required when registering or withdrawing their balance. We don't know for sure until it's proven if crashdice.com will ask KYC when you want to withdraw your crypto from their site.