Very informative article! All you ever hear about crypto currencies and bitcoins (at least from the people not involved with them) is how they will soon crash and burn. While they do fluctuate immensly, I hardly think they are in a bubble right now.
I would love to be able to speak from a more informed point of view, but I'm still quite new to the world (besides mining Dogecoin and Litecoin many years ago!). Informative post and thanks for doing all this research :)