Okay, this has been weighing on me for quite some time:
I am afraid Ethereum is going to "win". The reason I think this, is because I think ETH is most like our current system, and therefore the easiest to transition too, and it's easier to influence.
At one point I, extremely hyperbolically, thought it would lead to the next great age of human suffering. What can I say, I have a flair for the dramatic.
I am probably wrong about my assessment of what ETH is, but one of the reasons I left it behind is because of above. There is also a social component that is out of scope, but also was a big contribution to why I stopped.