Mass adoption is not happening because the bitcoin price/market capitalization is too low. If and when the price gets well into the thousands of dollars, then mass adoption has a chance. The price is having a hard time going up because it's still quite difficult for the average person to buy or take a long position in.
Sorry but that's not how it works. There's more adoption now at $220 USD than there was when it was +$1000 USD.
Yeah, people will use bitcoin when it becomes stable or shows a healthy gradual (slow) increase (1-3% per year). This will convince people to buy in and hold bitcoin so they have it available for when they want to use it, but they don't fear the price completely crashing