Nowadays, bitcoin is becoming more popular to the gamblers already, may some of the gamblers would not adopt in bitcoin gambling because they put huge bets and they want to stay safe, but if the volume of gamblers will adopt even if they are small bettors there will be a massive adoption that will happen and that is good for bitcoin and gambling industry.
Gambling with bitcoin is easy and convenient. They will just convert their money into bitcoins and buy bitcoins so that they can gamble.
They don't have to go to physical casino's , they can just play casino's through online, play dice and sports bet easily.
That's why bitcoin is the future of online gambling.