I think it's impossible to tell what stage we're at. Face it guys, we all know where we want to see BTC going, but nobody knows for sure what the future will bring... If I do have to put BTC somewhere on that graph, I'd say we're nearing the end of 'innovators'. We're there because BTC is getting media attention and new people (not just geeks
) are gradually joining in. These new people often don't have a full grasp of the whole BTC concept though, so to put us in 'early adopter'-phase, I'd say we need some more general awareness of what BTC actually is and how it works, not just knowing it exists and investing because people smell easy money (which it not really is anymore, one coin has become too expensive for that...).
So in my opinion, the only way is up and you're still really early if you join in now. Where this will end (if it ever ends, let's hope it doesn't) is impossible to tell though. One coin might we worth 10k in a few years, it could very well be worth peanuts in a few months. Rollercoaster ride baby!