I read the article by Elliott Prechter in the September Elliott Wave Theorist.  I think the biggest attraction was it's non-inflationary nature, followed by the potential for micro-payments.

I'm also concerned about government banning it.  Possibly one way to fly under the radar of government long enough to get established in the mainstream and thus make it politically expensive for government to intervene is to blah blah blah, blah blah, blah blah.