For bitcoin to be used as a store of value and a medium of exchanging for goods and services, It must be stable like others currencies. For the past 5 to 7 weeks now bitcoin has started to develop that characteristics and that is a big sign that both online and offline retails and wholesales business will started to used it very soon. I believe that in blockchain technology we are getting closer to what the founders has in mind.
The current trend of stability will most likely be short lived.
I do agree that stability is probably needed for mainstream adoption, but I don't think that it's an issue at the moment. People are still adopting bitcoin as a form of storing value because it is easier to access compared to a lot of the foreign currencies in countries that are suffering from hyperinflation.
But indeed, in order to achieve stability there needs to be more adoption, and the only way to see that is time. There isn't really anything we can do to speed this process up in my opinion, nor is should this be any cause of concern as volatility is simply a part of the bear/bull market cycles that is imminent within all assets, especially in decentralized ones.