Why is a casino's license significant to you when you want to gamble with bitcoin? I don't think that bitcoin casinos take steps towards being licensed. Provably fair gambling is the way to go. As of the legality, in most regions and countries it isn't illegal to gamble with bitcoin because of the lack of laws about it. Until this changes, we're probably not going to see many bitcoin casinos being blocked.
Without becoming licensed most of the casinos have started facing problems as their hosting companies blacklist them due to requests of those countries . So bitcoin or not, without being licensed bitcoin sites could face big challenges.