I have heard suggestions from my friends, to see news about coins / tokens that I trade on the market to be able to predict coin prices / tokens on the market,
Yes, news can affect the current prices in the market. Many negative news in social media and in the web spreading throughout the internet. Investors are very affected by these FUDs, this results in low market demand and it drags the price down. What your friends says does not mean it is always right, its better to do your own research to invest in such coin or token.