Gambling tokens are very different from other tokens in that they still have low trading volume and are rarely listed on top exchanges, even the majority of gambling tokens are only listed on low volume exchanges and there is no significant increase in price, the solution may be that gambling tokens should collaborate for the NFT concept or metaverse so that gambling tokens get interaction from new investors.
Because of the low volume they become less volatile and can easily increase in value, but then to know how strong their mend are is to expose them to a bigger trading market to see their real performance. I think most of the casino teams that have their token are aware of that and they do whatever they can't to keep their token limited to small exchanges to avoid being killed in the wider crypto trading market since they aim to develop their native tokens that will serve as a utility token and not for pure investment or trading.