In some countries, the flood of bitcoin has been seen as a threat to the world, while others have come to the door, making aggressive legal and tax policies that encourage people to use bitcoin. The former is hugely popular for encouraging bitcoin entrepreneurs, who have been criticised for being too harsh.
Yes , bitcoins in some country are a big threaten to the goverment because it effects to the economics of that country.Bitcoin is not a threat if they know how to regulate it, besides in the first place they all have the power to regulate and we shall only comply with it.