~snip~
I am not a big fan of Dogecoin, and believe that it is having very low acceptability. Also, it is not very stable or mature, to be used for gambling purposes. Security is another issue with Doge. I would rather go for coins such as Bitcoin Cash or Tether (USDT). Ethereum is also a good choice, but it has some security issues. So storing them can be a hassle for the gambling sites.
Next to bitcoin, Ethereum and Doge are mostly used coins on gambling sites.
I use to roll the dice on windice and frequently I can see this Doge has been used many times. So we can find this coin might be used many times next to BTC.
Still Bitcoin is growing everyday with and without help of gambling industry.
Fees is a big consideration and wise saver in term of withdrawal than of btc. Cause if we look into withdrwal charges, Bitcoin will be higher than of the other altcoins which is taking into the account that we should find ways in order to lessen and not just consuming our funds but instead it will be our additional profit.