Mass adoption probably won't happen in a way we're expecting it to happen in. I don't think that it will a regular thing to pay for your coffee or dinner using BTC. It may become a way of paying for something online, but I do see it more as a backbone technology and asset of some sort (yet to be determined).
It's probably going to take a lot of marketing work to get it out there for the common pleb. Probably some celebrity using it and tweeting about it would make it really known amongst the non geek herd.
I don't think that people can be influenced that easily. There needs to be an incentive to use it. Marketing doesn't work how many people think it works. If it was enough to have some rich celebrities advertising your product, the Tidal music service wouldn't fail like it apparently does.