I came across this news on CNBC where standard chartered bank claims that bitcoin will reach 5000$. Being a bank, this can be their wish and not a reality. Banks do not want bitcoin to become popular and therefore they spread this negative information so people panic sell and do not adopt bitcoin. 
Obviously banks will never like Bitcoin to become popular which is quite natural & understandable, as it is a decentralized and not in their control. additionally, If it is massively adopted as method of payment, it can potentially reduce or may eliminate their role in the financial system.
There is another reason Banks are hesitant to involve in Bitcoin, is lack of regulations in many countries, which is restricts their ability to deal in crypto currencies.