A widely used currency should not rise and fall.
But bitcoin doesn't have it's own stable price so if you value and understand it's own state of becoming a cryptocurrency that doesn't have it's own value, rise and fall may occur.
Conversely, assuming that the current price does not rise and fall, how many people will rush into the exchanges?
Estimate on how many people are going to exchanges buying the FOMO, buying the rumors and selling the news.