I believe that at current rates of adoption and usage, it's a bit of a stretch to talk about Bit civilization. A civilization doesn't need to encompass all humanity (in fact, they're often local), but it needs a community on a common territory that produces something different from others and doesn't limit its production by things of great utility. I'm not sure that it can work digitally and still be of enough significance to be called a civilization, and if we're talking about humanity as a whole, 1-2% of 'active members' scattered around the world is definitely not enough.