I dont tink that when the bitcoin is getting a stable price there will not be so many people interested into the coin anymore and that is only because of the coin has a variable value and that makes it interesting to invest with it you know.
So what you said is equivalent to saying that there is no interest in USD and gold, because they are very much stable in price!!!!
Bitcoin is popular because of its innovative technology and freedom from banks or the problem with inflammation of local currencies.