In my opinion they are really afraid if their citizen become rich and it must be harder for them to control the citizen. They trying to ban everything that they think will destroy the government.
India must not be doing this. If they are really banning bitcoins just for the reason that the citizens become rich and those bureaucrats will be losing their power to control the public. But I think this is just a fud. No one is such foolish to ban something for covering up this statement that their citizens might get wealthier. Rather every government work on this to make their citizens prosperous.