For the fact that we already have several casinos that have gone ahead with the creation of their ecosystem and even their blockchain with the native token to be used as a utility token of the casino, this token is fast and some do not require fees to send them from their host wallets.
Having varieties of altcoins as payment methods helped the stress of waiting and less fees because most of the altcoins give low to zero transaction fees and free networks that process payment within a second.
Casino tokens and meme coins are two different things... I am not sure what you wanted to say with your comment.
Just register at Betfury and BC, after reaching some level you can win Shiba from daily spins. We all know how meme coins got their popularity, for many of us that were a surprise. But here they are, still popular and with lower prices, meme coins are spreading their influence. I guess they are here to stay, and as long as people are using them various casinos will continue to accept them for gambling.