I'm pretty sure she didn't do it for the money but from some sense of moral duty. Don't forget, she took reign right after one of the worst wars in history.
Was it moral duty or was it wanting to have her name at the top of the list of longest reigning monarchs? It’s interesting that she died not too long after hitting that mark, almost as if she was just holding on to get there and then let herself die.
7 years after hitting that mark. I think the death of her husband last year has more to do with it than “yay, I got to the top of the list so now I can die”.