Is Bitcoin gambling is legal?
I dont see why it wouldn't be legal, as long as you are not on the United States or just in China, gambling with cryptos should not be a thing to be worried about.
And you can easily go to gamble in just a casino that accepts bitcoins, it is full of them, you with them on bitcoins or just any other currency and they give you chips for playing in selective games.
It is not difficult, it is full of them in Europe.