I don't think it will illegal.
I think Bitcoin is illegal because government should not allowed in betting but this coin is Decentralised cryptocurrency so many investors are involved in gambling in this forum. This make huge profit or loss whatever happens in this platform. So this is risky and insecured investment.
Yes bitcoin gambling is illegal because here in Philippines they plan to ban online gambling and i think bitcoin gambling including to that. Gambling can make a huge profit once person have enough luck if they are playing gambling.