$20 a day is not sustainable for long period
I tend to agree with this part of your statement. From what I have seen this looks very much like a beginning of a new bubble.
What sudden new reason is there for such huge value jumps? The Chinese? Nothing but speculation. Appearance of new bitcoin related companies? It's not like they build or tear down several bitcoin related companies per day to warrant such price changes.
I am certainly excited about what is happening right now, but I am also fearful that it might turn out to be just another bubble.