Once you click the casino name, it gives you the option to "connect your wallet" once you connect your wallet, your funds are 100% lost.
Isn't this is the way most web3 casino do their business? if this is what you are referring to connect on the casino, not the typical giving the whole seed or private keys.
I don't know how it is possible from technical side. But if the site is too suspicious, new registered domain, newly made site without any good reputation, no reviews in the internet, using or connecting your main wallet to it is the most stupid thing a person can do, that's why being knowledgeable is the only way to avoid them.
This is a very familiar scam in the crypto world but maybe relatively new in the gambling casinos. Usually the scammer will give you information about any airdrop or free money / tokens and ask you to connect your wallet. Once your wallet is connected, they will get hold of all your funds and your wallet will be emptied.
Similarly, many scam web 3.0 casinos may appear recently, and they will again ask you to connect your wallet. As soon as you connect it, the hackers will withdraw all your funds in it.
SolutionSo the question arises what the solution for this is and how we will know if it is a scam web 3.0 casino or not?
Well, as a precautionary measure, do not connect our main wallet (which has funds) with these casinos. Make a new wallet, deposit only a few dollars with which you want to play, and connect that wallet with casino. In this case, even if the casino scams, you will only lose very little amount.