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).
I think that bitcoin price is low because people don't realize or value the fact that bitcoin is an unencumbered asset, similar to a piece of gold or cash in hand.
Mind you, this is not true if you hold GLD ETF instead of actual gold or GBTC stock instead of actual bitcoin.
Apart from mobility (you can send bitcoin, but probably not gold), people do not value bitcoin's properties.
The result is a low BTC price.