I would play BoP through HDFC (or HDFC warrants preferrably) for its
a. housing finance - every person wants to invest in his own home one day. Its a big opportunity. lots of people moving to cities continuously shoud keep that momemntum going.
b. Its other businesses like Insurance are small today compared to housing finance, but insurance will be sought after by all these bottom of pyramid one day. Its also a big opportunity.
c. proven story, so less possibility of negative surprises. But that may also mean steady growth.