Don't confuse economists with policy apologists. On the other hand cryptocurrencies (in the grand scheme of things) are just a side note on the real economy (where the actual goods and services are produced) so don't blame them for not talking about something that doesn't have any real world impact.

Cryptocurrencies do not bring anything new to the table (yet). For the most part they are inefficent ways of transacting that do not warrant a change in paradigm of how to interpret the way that humans interact with each other.