I think people in rural area needs to be financially stable first before knowing bitcoin.
People in rural areas need to have the awareness about bitcoins, it does not matter and should not be a question about their financial status, if they can buy bitcoins at the time or not. Information is very powerful and vital, and you informing them is empowering them and helping them to know something that has the potentials to affect their life for better. Having the awareness about bitcoins can make them make plans to find a way to own some bitcoins, so they know exactly where to put their money when they get it.