I would say that those who have a long track-record and advertise on the forum are safe, such as Bitvest.io. But there are others as well. I don't think any are significantly safer than the others.
I agree, there aren't 'safer' casinos to invest in but doing due diligence can help. This is why track-record and reading reviews would give you a better idea of which places might enable you to minimize your risk. I too stand by Bitvest.io - it has been around long enough to know that you won't get scammed.
But the signature you are wearing is one of the Safest and trusted Casino also Mate? Cryptogames.net is one of my vouched casino in this forum as Dogecoinmachine is one of the most trusted.
I will not comment regarding Bitvest because this is the sister company of my signature lol.
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to OP , best to seek for the most longer and trustworthy than the new one.