Online casinos accepts bitcoin now. I believe it will only a waste of time betting live using bitcoin especialy the long wait for a single transaction to get confirmed. Its not possible to do 1 transaction at a time while betting thats just a waste of your time and the bankers time.
I once came across a casino site that claims they have a system for QUICK Bitcoin transactions. I didnt really get what they were talking about, but one thing I knew was that the site looked suspicious. Well, Im not used to betting in every online casinos I come across online. If I want to choose a casino, I will first make some research on it to see if it has a good reputation online.