Casino are using different kinds of coins now so the players choose what ever they want to use coin. Dogecoin is one of the players use because the fees is very low and compared to the bitcoin and ethereum the range of fees is very high so dogecoin is most usable coin but I use XRP when I playing gambling when Im sending coin and withdrawing it because it is also cheap and fast transaction only minutes it arrives to your wallet not like bitcoin takes half hour or more before you spend your bitcoin which is not good but all the coins in that list is probably good coin.