Sometimes some of the news affect some individuals by altering their blood pressure values. They begin to think about how bitcoin prices are going to revive pertaiaining to circulating informations. Some people get frustrated and burn out then they end up in panic sales. This actually goes a long way to affect prices of bitcoin since people are buying at cheaper prices.
News can bring more investors also it can also reduced the number of investores. In one news everything can happen just like many people will be interested in bitcoin or in other cryptocurrencies. Because of false news some people tend to do panic selling but you should stay calm and always check the news if it is true or not.