I don't know why the situation is like this, but i suppose that in other countries, there are a lot of scammers that can leave casino without money. Anyway, if I am not right, I am sure that this things are done for the security of everybody. Moreover, if someone hacks the server, all the players can remain without money on their accounts, so maybe this is the best decision for them. In my country we play on aucasinosonline.com, there we can also deposit btc to play and we don't have any problems with payments.