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.
I think a few things which will attract new bitcoin users for us to lead better mass adoption would be more successful business ventures either related to bitcoin or rather big companies accepting bitcoin, that would make good news in the press. Further would be success stories of people who did great after buying bitcoin, attracting more people to join in for personal gains. Then, we show them the bigger picture, the world which does not limit to us, and the truest potential of block chain technology, making these bitcoin users into bitcoin soldiers, and they fight for the bitcoin community against fiat, screw the banks. GO SPECULATE!
