Yolo really has a professional and a helpful team and anytime if facing any problems either on mail or on chat they are always ready to help you. Due to which the site is doing so well and will continue to perform better. Inspite of several years now it is being used by so many users and recommended as well. As far as the coin is concerned not sure if TRX would be the ideal choice because it should something be having a good future value as well and TRX in my opinion does not fits in.
I understand that the team is amazing at what they do, they are working towards helping people recoup that LTC investment for example so I can totally see them being helpful in any other topic as well. But at the end of the day somethings are not even on their hands, they could add some coins but it may not work as well as you think it might, for example adding tron could come with complications as well.
On top of all that, you would have some coins who people could stake and what are you going to do at that moment? For example ETH will be a stake coin soon, what are you going to do about it? Will you put your money here instead of staking? Will you prefer that? Or do you think yolodice will make it both profitable for gambling but also give you the staking income as well? All these are very hard questions.