Bitcoin attracts most users only because of its rapid price increase, and its stability will lead to a decrease in interest.
Yes it is the most attracted characteristic of bitcoin. And if that is not because of bitcoin's adjustable price, there will be no more new investors that are going to enter to this crypto currency but because of this characteristic, there's a lot of investors that sees a lot of opportunity for it.
I am also seeing that many people come to adopt and invest in bitcoin when the price of it start to increase rapidly that is making bitcoin more popular but still for making it a regular currency we will wait for a stable price as if a stable price will be obtained then people will adopt it as their global currency instead of dollar.