Obviously they are afraid. Because Bitcoin is a digital currency that cannot be monitored by anyone including by banks and the Government and cannot be controlled by people or groups or even governments and banks. So that's what scared them. Because Bitcoin uses the Blockchain system, which means a decentralized financial system. Many like it and this is dangerous for the Bank and the government. Because they are afraid of Bitcoin replacing fiat and the Bank could go bankrupt and the financial system in a country could be destroyed.