The possibility that it was a non-state / non-centrally controlled money was what first got my interest, because I was already quite critical of the fucked up system of money the world had. Man, I'm more excited about bitcoin everyday. All the innovation and real-world uses that are being developed, and what they will mean for freedom, and prosperity, and quality of life etc. is super exciting. Of course, I can't seem to get my mind of the philosophical / spiritual implications of this thing, and that seems to provide a constant stream of juicy ideas to chew on.