There was big talk about bitcoin becoming mainstream in 2015, but I don't think it's going to be at the very least 3 years before bitcoin goes mainstream like Wikipedia did 10 or so years ago. New things take time to adapt and as far as an open-source technology like bitcoin and blockchain is concerned, it will take a long time still until people can trust the digital currency and be confident the currency will not collapse. By then the price will probably be quite high.
Yes, Bitcoin is quite far from mainstream adoption. Even educated, (reasonably) net-savvy people might not have heard of Bitcoin right now. I have tried explaining Bitcoin's principle to a lot of people. Most of them have never heard of Bitcoin before. I think at the next block reward halving (2020), you will have fewer bitcoins, mass adoption and an amazing price.
