If B if your answer then I doubt you have long to wait. There's already games like axie/roy that do that sort of thing but not with good graphics/strategy yet imo as well as live table games (which I assume function like actual casinos and I was under the impression they have these for blackjack and poker).

I'd prefer a PvP that was designed and played like an MMORPG but I guess we're a while away from that being a thing (wagers could be placed on leagues of those imo too to make it more appealing to gambling).