What we are saying here is not that much true! Its not really an evolution of the bitcoin but just some changes and upgrades that are made to bitcoin over the time. An evolution would be complete transfer of technology from one form to another with heavily modified features of the bitcoin and also its use in day to day life. I see nothing has changed since then except the fact that it has grown in its volume and prices. Now thats not an evolution but just the demand and supply algorithm playing around the gravity. It is fixed that over the time demand will rise and supply will go down to create that momentum.
Anyways, nice write up though.