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.
There is already a large user-base in bitcoin, the only thing lacking for us to hit mainstream adoption is the number of places in which we could actually use bitcoins to buy stuff. If the number of services and merchants accepting bitcoins increased, we might actually see mainstream adoption but for now, there is a limited market in which we could actually spend our bitcoins. Agree or not, we are mainly using bitcoin for investing and not much more than that. Most of us use bitcoin as an investment opportunity to take us to our millions and not for actual spending.