Twitter is just a part of media like print / electronic or social media including Facebook; linkedin ; You Tube etc. And each type of report on any type of media has effect on the price of bitcoin. When there are positive news the price goes up and in case they spread negative news then the price falls.
that was why i said that somethings bad news is a disease, you loose a hug amount of money by talking any bad news into your heart, so the best things is that whatever you doing don't determine the news all over.