It seems you forgot about the utility aspect for the pure reason that you, personally don't have one for it.
The thing is, I can find lots of things to do with bitcoins. But in virtually all cases, it is much faster, convenient and liquid to use dollars. None of the bitcoin revolutionists here have explained -- what can you do with bitcoin that you can't do more easily with fiat?
You can store value / invest. And you can buy drugs in mail.
What else?
I find shopping with BTC a lot more convenient. I don't need to give away the necessary details for charging my account. By the nature of my work, I travel awfully lot. I got sting by card fraud many times which is quite annoying.
I can do international transfers very quickly and without horrendous wait times and fees. I can buy desired things which are not sold in my country (electronics, domains and many more).
As I said it previously, the usefulness of BTC is highly dependent on personal circumstances and geolocation.
Saying that it won't be mainstream is ignorant in my opinion. maybe it will maybe it won't. time will tell.