I wrote a post about my own view on the whole bubble thing, specially concerning ICOs. My point is very simple, if each one of us do not make their part, we can ruin the party. If we get enough bad examples out on the street we'll sure piss off a bunch of regulators and traditional investors, and that will likely limit the whole of crypto and blockchain economy's growth.

About the big currencies themselves, I shared my view on this post comparing the money sizes.