Keep us posted if you finally get your payment, I do hope you receive them smoothly, that's a lot of money so I expect that casino to maybe ask you for KYC verification, Bitcasino is very popular online and there was a time when they are struggling with their customers, I read about their review online where they are given 2.5/5 rating, later them made some adjustment and climb up to a better level in gambling ranks.
Today Bitcoin is still under $30,000, your winning is very good enough to set your future ablaze, you can get 4 BTC and still have some thousands of dollars left, OP this is a big opportunity sleeping at your doorstep, all you need to do is open the damn door for the opportunity, you will be set for life.
Wake the Hell UP.
He's okay if the casino asks him to do KYC, especially if it's for the benefit of withdrawing his winnings. Bitcasino is one of the trusted casinos, he doesn't have to worry if he will get scammed. Bitcasino has been on this forum for a long time and has had a great reputation for a long time.
So he must remain patient and wait for further news from representatives of Bitcasino. And he should give news when the problem is solved so that we also know the continuation of this case.