understanding how bitcoin works for people in that kind of environment will appear too technical for them because of there lack of exposure to foundational technological knowledge. there is a level  of knowledge that is needed to consider some form of investment and for people in a very rural part of the world, it is quite understandable that their investment choice will be more centered on what they have been used to.

talk investment to someone that all his life has been centered around farming, fishing or one agricultural niche or the other, his exposure would not allow him try any form of investment he is not familiar with. digital divide is what ought to first be treated before introducing them to bitcoin investment. it might surprise you that some of them don't know how the banking system works and if that is so, how then can they understand bitcoin? if you try to persuade them by all means, it will only suggest that are trying to scam them. people in rural area need exposition to basic social amenities like you have pointed out and from that point they can now grow into knowing about bitcoin and make the choice of investing in it or not.