Are there some online casinos which accept BTC?
I would like to recommend you to try the online casino from https://luckybity.com They accept some of the most popular cryptocurrencies like Bitcoin, Ethereum, etc. and they offer great games. I like playing there too, so I hope that you will find it nice to you too. Good luck with it 😉
Of course, there are casinos with accept crypto currency. There are dozens od such casinos now. You may check http://moneyonlineslots.com/payments/bitcoins/ to find a list of such casinos.