The main reason why a token built is to have a specific use . so if a token is a gambling based token , its normal for the devs of those token to create a gambling site . but i dont see that this kind of idea are getting trendy or indemand . i still see alot of popular casino and gambling sites that only accept btc , eth , bch and other top cryptos .
Yes, I think that using the token as the gambling bets will be the next trend because the devs can easily to create a new token to use in the gambling games. They can also try to register their token in the exchanges so they can get a double benefit because some amount of the token will be used for gambling games and the other amount for trading. And that will attract more investor to come to the project.