A bone marrow donor has to be genetically related and if I'm not wrong, I think they prefer this from a younger person purely because of how the person donating would recover.
I'd probably not qualify.

Yes. I was a match and donated several years ago.

Yes. I'm a universal organ donor.

I already am, because if I had the chance to save a life it would be the greatest gift I could ever give

I would have but I'm not sure if I could now or not

For a family member or close friend yes

Yes, to battle something for/with someone you know.

I am on the national registry but have not been a match yet

only if they pay for it.

Yeah id do it but I hear it's bloody painful

You get payed a lot for bone marrow just a tip for anyone is financial ruin