I've been considering this over the past few days, I have a vested interest (early adopter) and I don't think the current performance is a bubble. It took some months for online properties to build the code needed to facilitate bitcoin, since they are now coming to fruit the growth pattern is organic. Bitcoin started with a tech savvy crowd, and as we know, the ones who can understand a system early are the first to benefit from it. I found the comparison of Bitcoin to a Tech startup to be particularly interesting, in the article it is estimated that Bitcoin is understated by two orders of magnitude. http://vincesamios.com/bitcoins/bitcoins-are-a-tech-stock