Glad to hear you are feeling better today. As I said in my original reply, i didn't know your circumstances, but if you have a wife who loves you and family nearby, and enough money to live comfortably, then you are luckier than some people......but I'm sure you don't need reminding of that.
As for "God help anyone who lives alone with with this bastard disease" as you so kindly put it.....well, indeed. There really is no hope for us, is there??! So thanks for that.
Fortunately I have my own way of coping which doesn't include taking notice of random negative people who don't even know me.
It sounds like you and I are in a similar situation.....we both live alone with no 'loving' husband / wife or nearby family to keep "The Fear" at bay.
I know what you mean about "gallows humour" - I do that too!
All we can do is take one day at a time and let the future take care of itself, as much as possible. And as things come up that need to be dealt with, deal with them. And remember that nothing is ever as bad as you expect it to be!
This works for me - most of the time anyway.