I think the dynamic pricing of bitcoin and huge future prospects make bitcoin the best and most popular crypto currency. If the price starts falling down constantly, then people would not take much time to switch to a different currency with better prospect.
You are saying the view of an investor / trader. But try to comprehend the view of merchants. As stated when price of bitcoin become stable, it will only shift audience and continue to be popular. YOu may not be interested in a stable price, but I do like stable price and I will get more interested with it to use as mode pf payment to my store.