...because of the "recent changes in bitcoin price" however after looking at the price graph it has been pretty stable over the last 3 months. between $90,000 and $105,000.
I don't think a $15k increase/decrease is considered stable, especially for a business, that's a huge gain and/or loss for a business.
The price changes of a currency should never be a reason why a business will delay users withdrawal requests in my honest opinion, so for me, the excuse that they delaying the processing of a user's withdrawal requests is due to price changes of bitcoin is totally a lame excuse, what I personally would understand from the such an excuse is that they probably have been trading with users fund and may have gotten a good chunk of this funds tied or locked up in a trade that is yet to turn profitable due to the recent decline in the price of bitcoin.
Casinos like this should be seriously avoided in my honest opinion, because any mistake that they ended up losing huge funds to trading may eventually lead to them closing the casino business, and causing their users to lose money for no just course.