Solana definitely makes sense for casino payments, especially when you compare the fees with BTC or ETH. But I think the bigger issue is making sure the casino actually supports the token on the right network. One wrong transfer and those cheap fees wont matter much lol.
I'd probably stick with USDC on Solana rather than keeping everything in SOL. No point worrying about price drops while playing. Memecoin withdrawals sound interesting too, but I'd be a bit more careful with those.