It is something which can be only overcome within time. You know 10 years ago internet access was much more scarce than now. But at this moment, areas where internet didn't reach before already have connectivity, while places where there was internet access, but it was precarious, have developed quality a lot. It's a process which takes time to happen, unfortunatelly, and we have to wait...

To create physical bitcoin doesn't look a good idea, because it's not supposed to work like this. Bitcoin demands internet access, so people can deal in real time person to person, without involving any central middlemen and barter systems.

The new generations have an essential role in poor areas, so they can introduce the older ones to technology. We have been seeing this on this forum from times to times in different threads, especially at Bitcoin Discussion board. A week ago I've seen an african teacher who bought a laptop with signature campaign income to teach his students about bitcoin and blockchain. Step by step things are improving thanks to these people.