I think there's lots of room for skepticism, certainly the lack of a "killer app" so far for this type of technology (at least one that doesn't involve illegal

I think there's lots of room for skepticism, certainly the lack of a "killer app" so far for this type of technology (at least one that doesn't involve illegal activities) is pretty glaring. That said, I find it highly unlikely that the engineering behind ethereum won't have lasting impact, even in unlikely case that cryptocurrencies themselves end up being a bust. There is lots of deep thinking about cryptography and networking and game theory here that I think will have lasting impact.