I am not gambling whenever bitcoin price is pumping. I don't wanna risk any potential losses in gambling because it can be more profitable if I just hold onto it or just trade with it. That's how bitcoins price affects my gameplay, I totally stop for a bit and focus on more profitable ways to do with my bitcoins.
but if you have some bitcoin on your crypto casino or crypto bookmaker account it would be better try to increase its amount gambling carefully. though altcoins price is also pumping so we have to gamble carefully using alts.
He can try to use bitcoin to gamble, but that is only if he can accept the risk of losing his bitcoin.
Suppose he has some satoshi, and the site has a conversion to the altcoin. In that case, he can try to convert his bitcoin to the altcoin such as dogecoin, litecoin, ethereum, or trx, so he still has the rest of satoshi in his account that he can use to buy more amount of the altcoin.
That is a good suggestion to him if he still wants to test his luck.
With bitcoin price now is at $19k, I don't think that people who don't have many bitcoin will use that bitcoin to gamble because I think they will use their bitcoin to search for more profit from the other way.
If he only uses his bitcoin, and if suddenly he loses, then he will lose his money without an easy chance to get his money.