More importantly, why do we want Bitcoins to be popular in rural India?
We have bigger problems and issues to tackle as it is. I fail to see how Bitcoin helps with any of those.
That is where the buck stops.
If you can enable the cow owner to sell milk for Bitcoin and someone to sell him rice, wheat and booze, the loop is complete.
While there may be bigger issues at hand, financial independence is pretty huge and the best part of this is that it is already available. The larger issues will take time and some of them do not even have a solution as yet.