So the question is at what point is Bitcoin fully adopted?
I don't think that this is an answerable question.
Most people in the world don't give a rats ass about our idealistic goals with decentralized crypto-currency.
They would prefer to use Paypal or a credit card.
So Bitcoin will only continue going up if:
1. More investors drink the Koolaid.
2. There is some compelling mainstream use of Bitcoin that we haven't seen yet.
I know of several off the top of my head, that were not only alluded to in the white paper, but not implimented in a single alt-coin that I've seen yet.
So it is quite easy to displace Bitcoin, simply invent an altcoin that has some very important use which Bitcoin can't do, and which many people need desperately.
I know what that is.
So goodbye to you. Enjoy your myopia.
There is no feature, compelling or otherwise, that Bitcoin can't replicate. The only question is whether or not the userbase considers your 'killer feature' as highly as you do. If they do, then Bitcoin will steal your idea. I'm still waiting for your grand announcement, BTW, and I'll be the first to point out if there is prior art within the bitcoin ecosystem.