I think most users are involved in Bitcoin not because they belief in the technology, but because they hope the price will go thru the roof. So let us say the price would be at $900 for the next 50 years.
Would you still use and buy Bitcoin or would you leave?
EDIT: Poll added!
These aren't mutually exclusive. The price will go up because the technology is innovative.
More users will increase the price, and an increased price will eventually lead to a more stable price. But only after the price has risen.