Knowing India has many cryptocurrency players, lifitng its ban could mean a challenge and an encouragement to other Bitcoin users. Once they heard that the ban is lifted, there will be lot of players who will dig in, and possibly, BTC's price graph would change. What we don't know is if it will come down or go high if the ban is lifted - but possibly, it would be the latter. It can bring positive news as well as signal for other countries (if it would be a big news) to try to invest also in Bitcoin. Though there was no major impact in BTC, as the whole of India didn't experience the ban, its come back can surely make Bitcoin more alive.