I'm a cynical old coot, but I tried. I cornered him once over a pint, I just couldn't get my head around it. I still don't see a single reasonable use-case.
here's what's best to keep in mind - there are no fundamentals, there probably won't be any use cases, there is a lot of greed and stupidity. the latter two are the golden ticket on a ride upwards as they're almost infinite resources. make sure you get off at the right time as they eventually turn into an express elevator to hell.