Yes,the crypto industry is limited for the disabled people,but can you answer these questions:
Is it easier for physically challenged people to use fiat money(cash)?
Is it easier for physically challenged people to trade on the stock markets?
Is it easier for disabled people to use gold or any other precious metals?
Disabled people are facing difficulties everywhere,so it's pointless to put the blame only on the crypto industry for being not enough user friendly for disabled people.
in the UK we have it lucky coins are different shapes and sizes
1p,2p,5p,10p thin round and different diameters
20p,50p mid thick, hexagonal and different sizes
£1,£2 thick and different sizes
bank notes are different sizes too. making it alot easier to identify physical money compared to say america
however when it comes to online trading of stock markets, ebay online groceries, bitcoin. there is actually accessibility options to turn text into sound. so anyone just wanting to use a computer that is blind wont see any problems as they are already set up. and so then deciding to trade online. is not much of a leap
however a blind person going from UK to america only using physical money. will find problems trying to understand the new form. that is less unique(us bank notes all same size).
yep digital money is actually easier for the blind when buying things online internationally compared to physical trading internationally