I have found any one over the age of 50 has no idea what it is and will never use it willingly; 95% of women under 50 that know about it think its no different then world of Warcraft gold or online tokens for video games. Bitcoin will never be main stream. At most 5 to 10% of the world will adopt it. But it will always have a place in the world.
Older generation don't stay that way forever, they have this habit of eventually getting so old that they die
Younger generation then become older, and are then the adults. So maybe we'll need another 10-15 years before that kind of effect takes place. We also don't need 100% adoption to thrive, we've been doing pretty well with just 0.01% to date