The plausible reason why the government forbids bitcoin is that the government does not want other currencies to use for its people other than their respective national currencies and they feel that bitcoin poses a threat to the economy of the country so they think bitcoin will create destruction for the national currency in the country. Such governmental thinking would be different if they tried to accept bitcoin as another currency option for their community use. With their prohibition asserting that the government does not accept the technology created as a solution to the problems of the existing economy.