I do recommend the casino to them, and I tell them about the crypto payment option. But most times, they are skeptical about using it because they hold onto their crypto dearly and barely experiment with it. Only a few try it out to see the advantages it offers over using cash. But most of them are always hesitant to give it a try with their crypto.
Not everyone wants to spending any portion of their holdings on gambling despite how small amount it is. But there are casinos that have incorporated fiat deposit feature into their system which you don't have to use your crypto to f you don't want to. You just can use your traditional fiat money by depositing into your account. Example, Stake.com has deposit in fiat as well and the procedure it's simple and fast to do.
Not everyone wants to spend part of their crypto holdings on gambling, even if it's a small amount. However, some casinos offer fiat deposit options, like Stake.com, where you can deposit traditional money instead of using crypto. The process is simple and fast.