I guess some kind of cross chain something or other might end up being developed.

Cross-chain tech is already a thing, I wrote about it one or two weeks ago, you even have an alliance of the biggest cross -chain blockchain trying to further improve the interoperability of all different chain, I'm so excited for the future.

If you happen to want to read more about the cross-chain tech here: 1, it's not really detailed but it has the basic stuff and what it might be used for in the future.

I think developers will have to start learning about basic economy for each game they make to prevent pyramid schemes from happening.