We are still in he early adoption phase, there is too much people in the world who doesn't know anything about bitcoins.
It doesn't really matter. Poor africans for example know about USD or EUR but they don't own any. They might find out about BTC soon too, but... doesn't mean they'll buy.
I don't think there's much room for unforced adoption. But, if some govt makes it the only way to pay, that would be a different story. My bet: USA will be the first, after USD crashes.