Yes this is going to be a big help to those person with disability, however for me even if person has its disability they still have the right to be respected and should be treated equally unlike what you said that they oftenly discriminated. Whatever your situition is for me it doesn't matter so long as you did the right thing.
I think this idea is very unrealistic not unless those disabled persons will trade bitcoins. Besides how possible it is to just give bit coins to them? We know that this is volatile and how could they use it? Let us not just give suggestions that aren't gonna be helpful. Not unless bit coin is being adapted by the government that crazy idea won't happen.