very few people in the world have any or truly understand what it is yet. Mainstream Adoption is a dreamlike for future and will take a few years yet.
Yes very few people are aware about the bitcoins yet and it will take a long time for bitcoins to hit the mainstream, bitcoin is getting popular day by day but it would not replace any major currency looking at the present scenario, when it replaces any major currency than there are chances that it would go on mainstream but still it would take few years.