Why will a casino request for that or did you informed them during your registration that you receive salary in crypto? A casino can only request for your account statement via the normal fiat currency that you receive payment with. If you want to use a wallet transaction record, then you can manually screen shot all the in&out transaction in that wallet or you can screen shot from blockchain but if you actually give your wallet to anyone (perhaps the casino that wants it) they should be able to scan the wallet and see every transaction that had taken place in it.
How would the OP explain to the casino that he is receiving salary or income to his crypto wallet or address? Most casinos will require bank statement or of that sort for proof of income. But never encountered yet about asking for a crypto address.