PvP gambling would be awesome. Many years ago there was a platform that let you gamble against other players in an online mini putt putt game. It was fun. This was pre-crypto. The problem is that people always find a way to cheat or they master certain things so it isnt as fair as it should be. One day gambling will find its way into popular video game systems though. When you can bet real money against players on your Xbox playing popular games, that will be awesome.
This is the direction we may be headed, after all what are loot boxes if not another form of gambling already? However this will probably push the rating of those video games immediately to the A rating which is only for those aged 18 and above, besides this will bring all kind of trouble especially when it comes to the matching algorithm, since now players could use their smurf accounts to beat players with lesser kills, collusion will become a problem, players could lose intentionally to drop their ranking and then get some easy wins, and a myriad of other problems which we see whenever money is at stake.