Exter pyramid (inverted) for cryptocurrencies is nice intellectual idea, but not really anchored in reality, IMO. In this subject we always need to refer to: what function does money play (3: store of value, transactional and reference). There should be all three functions covered for entity at the bottom of the pyramid. And this bottom entity is destined to collect value flowing downward. As we know, Bitcoin is transaction medium, firstly.

Nice and creative conception, though.