I donate blood monthly. It's a lead by example, golden rule thing for me, but actually very selfish, though not for money.
I have kids, I want there to be blood available if they ever need it. So I want others to donate, but I can't expect others to do something I'm not doing. And maybe me doing it can inspire or at least shame others into doing it, so I do it.
100% because I want me and those I care about to have blood if they ever need it. Everyone else can fuck off, generally. After they donate blood.
It's also funny to watch gay male nurses at intake ask if you've ever had gay sex, since it would disqualify you from donating if you did, so they know their own blood is considered tainted for life and unworthy of even being considered. Haha.
The rules about gay-sex and blood donation at least in most of the country (USA) are gone and have been for at least a year or two now. There was a period of time that Red Cross would not take Vaxed blood too, that is interesting right there.
There are private services to allow you to "bank" your own blood if it is needed for some reason. That is probably outside of most peoples reach (I have never looked at prices, probably could not afford it anyway).
Also, there is a strange gray area now with the tranny shit because "no I am a woman, I have never had gay sex" (as a man that has gay sex but thinks they are a woman and the med industry agrees).
They still ask me the questions. I've never said yes, so maybe it doesn't change the outcome? The trans thing i hadn't considered but I have a crazy feeling not too many of them donate, they're too self involved and mentally ill to do normal people things.
The personal blood banking...that's a good thought.
Oh, the trans thing is like the gay thing. They probably have a kink on thinking that "normal" people are being injected with their poison blood. I would bet most of them that are able to donate. They probably get off on it.