Not only india was ban cryptocurrency the're many and also some reason why, because the government are afraid and worried that they can't control the quick spreading of bitcoin, they do not know what it will lead to and they don't know that bitcoin was very useful and helpful to everyone.
This is unfortunate. Because India is a highly developed country in information technology, and its people are exposed to technology in large proportions. This means that people can collect and use Bitcoin as well as Altcoin at very high rates. But the ban from the government has had an impact on the personal economic development of the people of India. Perhaps in the future, hope the government will change the decision.