To the illiterate? Unless they have a family member or a friend helping them with their Bitcoin purchases and transactions, I would probably say that there are no benefits (that I can immediately think of).

But if they do have someone helping them with all the text, in order to obtain Bitcoin, then they gain the same benefits as anyone else who hodls Bitcoin.

I cannot really imagine an illiterate person even using any kind of modern device, not to even mention perusing on the internet...

But who knows...