In my opinion it is not stable from the time when I started because the bitcoin selling and buying speedly going on in the internet so we can't say there are based news effecting bitcoin , well here a good thing that flutuation in the bitcoin is s profitable thing for us to make earning ( I mean trading job ) .
Here also the news of real descion of the governments of the countries about the bitcoin increase the bitcoin flutuation more ( for example when a state of Russia got banned to use bitcoin and the price got down )