Isn't paper currency very friendly to blind people?! they can feel it with their hands , because paper currency is also designed for the blind .
I agree but I don't think not all country made it friendly for blind people. But of course cryptocurrency is much way worst for elderly people and person with disability, without gadget and internet it's impossible to transfer Bitcoin and other cryptocurrency but maybe if there's a way to make transaction offline and maybe if there's an affordable device like affordable wallet that can make offline or online transaction that would be much better.