for the Indian part of the story well i don't think that it is responsible on its own in driving the price up to 750 USD, it may has an influence but it isn't that big imo
Demand coming from India is way too insignificant in order to have a real impact on the price. I think the idea of traders that Indian people will slowly find their way into Bitcoin, is what's really driving the price up. Again, a speculative increase. It's of course not the only reason, but as always, China is playing the most important role. Western exchanges just kindly follow the way up. After China, there are several smaller factors that might also have a certain amount of impact on the price when combined. Either way, these days are great for all holders.