Bitcoin has no prejudice. Bitcoin prefers no race, religion, or person. It is freedom. This and the fact that it requires no trust is why I love it so much. As soon as there is human interference things go "wrong" or go "missing".

Talking about blind people. Maybe bitcoin is better than using notes? When you scan the qr code the person has it will tell you what the details and amounts are. Maybe with banknotes, you give the wrong one day? I know they different sizes but for someone blind giving someone, the wrong note can happen if you in a rush or something, think about it. So having a QR code that announces out with a voice what the details are is really helpful. You can also enable safeguards for the blind person which will also increase security. For example, they must say a certain word with their own voice in order to fully confirm a transaction before going out.