I don't think that the idea of cryptocurrency is incompatible with any of the religions. First of all, the basic idea of cryptocurrency is that of a digital asset which is protected against inflation as a result of controlled supply. I don't think that any of the Islamic tenets ban such an asset. As far as I know, Islam only bans taking interest on loans, which is not applicable for cryptocurrency. Even if there is some aspect of cryptocurrency not compatible with any religion, the leaders of that religion can create a new cryptocurrency that is compatible.
Dubai has a majority of 80% Muslims. And in Muslim, gambling is “Haram”. Haram is something that is unacceptable and has to be stopped immediately. Unless you want yourself hanged or you beheaded.
Dubai is strict enough that even it’s their family member who would like to establish a gambling platform, they would point a gun at that one. Besides, gambling could not survive in Dubai, people won’t hesitate to avoid it because their rulers are good.