I'm a big picture guy - I see broad strokes and connections. 
 
What I see is that we have been using the horse and buggy of cryptocurrency since 2008 and it has served us well.  However, the combustible engine (of cryptocurrency) was just invented. 
 
Is it perfect?  No, but it's light years ahead of what we've been using. 
 
Will it be all that civilization needs, forever and ever?  Maybe or maybe not - but it's the next step and it's here now.  There's no use arguing about adding small motors to horse carriages when you have the real-deal you can use instead.