This is a known fact if the price goes up it will surely go down. What happens if the price of Bitcoin falls to $1000 in 2018, will this be considered as a Worst Case Scenario or something else?
I can't predict fast as you assume, the fact that bitcoin still has a large value. and in the process of growth to stabilize it will take a long time, we have already discussed. so what you say is far from possible.