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).
Yeah, the thing about PvP gamling, is that most of the games that i've seen, they suck in terms of graphics and strategies.
Also, I believe having a hardcore game such as MMORPG, would be quite frustrating, as these games usually are to much skill-based, with a large gap in skills between the average player and the very good one, which makes the average player afraid to play, fearing if they match-up against a smurf.