It's possible in small groups and for some streamers but it would be hard for casinos to adopt it this early because Axie Infinity still has a lot to launch in the coming days. They've just started and still trying to deal with the improvements that they need to accommodate lots of players. I believe that gambling on it would be possible if that would launch their complete land in the future.
If you are right about it, but it should be noted that the main strategy that AXIE Infinity has for now is that it is taking many people or clients from countries with inflationary economies, In Venezuela it continues to sweep, there are more and more people entering the game, now in Argentina they are entering the game with everything obtaining more liquidity.
Many are looking for a way to be in the Arena for PVP combats, because having a group of Gamers friends, some are creating many armies of Players Killers to take SLP and thus earn more. I think that one of the updates will be to launch the free mode of playing, so that everyone knows the game and at least the main cards.