Of course those coin that's accepted in gambling site are those who are known so it's hard to waste those precious coins. Just use fiat so no need to regret for spending coins when the bull runs cross the market.
I think popular coins are in the best interest of gambling sites, coins like bitcoins and ethereum
are likely candidates since they are quite popular and pricey but at the same precious and people
tend to hold and invest in them. But in the same sense, they are also perfect to lure in potential
players with hopes to win more and double their stakes. But I think different coins or options
are in play with gambling sites nowadays, well gambling does comes with it similar risks just
like with cryptocurrency in the market. I think it won't matter as long as the coins are good
enough and things work out well for everyone.