Not everyone likes or uses so-called bitcoin, but every country has an interest in it. In illegal situations, people use this system to transfer money easily, and states allow it. No one should be cut off as a good angel.
Bitcoin is already considered currency, its been funding many noble act like the Greenpeace movement. We use it to donate in Ukraine war too. The Curacao or Cyprus gaming license provider probably doesnt care whether the casino accepts BTC or only fiat as long as they receive pay from these casinos.
If they are to regulate, most likely they could only approve a few crypto casinos. Unfortunately they are not regulators of online casinos.