If you are gamblers on Stake.com or Primedice, there is a vote for potential upcoming new coins on two sites. Here you go:
[Vote] Next coin to be added to Stake.com & Primedice. Temporarily, Stellar and Ripple have stood at most favorite coins from the Vote Results. I think they are both good for those sites, especially Stellar. If you have not voted, it is time to vote and show owners your favorite coins on their sites.
I agree with you, I have been waiting for the appearance of a stellar for a long time, I hope they will add XLM

Adding XLM will boost the potential activity and DGB also can be a great choice if Stake management considers its availability. To be honest, the deposit coins are not variable than the competitors.
Looking at the poll, it seems like Stellar is in the lead, right behind Ripple. When I first took the poll, I could have sworn that USDT/ Stablecoin would have the most votes but its somewhere in the middle.
Really surprised with Crypto being as volatile as it is, more people don't want to gamble with a stablecoin and protect their original capital.
Also surprised they even included it in the list because last time I asked tether to be considered they didn't want to add it due to the regulations that surround it.
Stablecoins will be not good for crypto casinos besides hedging a volatility risks of cryptocurrencies. It is not surpirse to see these results, demand creates a supply