I don't understand why people keep talking about bubbles. The supply is fixed (or capped, to be precise). The demand keeps increasing and nothing indicates that the demand will stop increasing. That is really all anyone needs to know.
Even supposing we, somehow, were in a bubble, something would have to cause it to pop. I would like very much for the bubble proponents to explain what this something might be but it rarely happens.
I wholeheartedly agree with your view of the situation. With a fixed supply and increasing demand, the only thing affecting the price will be "What can I use this currency for?". When the general public starts grasping the possibilities of Bitcoin "Shit will start gettin' crazy" in lack of a better way to put it.
Of course, demand could start going down and $/
BTC along with it. However I have yet to have anyone make a convincing argument for there not being a demand for an untraceable, no fee, world wide, distributed currency. Most don't understand the enormous gravity of the situation of having a currency like that in the hands of the people, uncontrolled by governments and financial institutions.
I can see a future where Bitcoin has stabilized enough to be taken seriously. If Bitcoin becomes a real alternative to Gold or Silver... then prepare to be amazed.