I still don't understand the volatility argument. Bitcoin is up 10X since spring 2016.... that volatility is not a problem! You just have to not care about the %30 up down in the middle.
The price is growing i agree. Volatility relating to security and assurance. Not being able to trust exchanges, having to trust the developers because majority of the people will not read the code for many reasons and lack of regulation. The fact that there is nothing to stop a bunch of people getting together and attempt to control the network. Which probably already has happened. These factors add up to volatility.