I banked, and it ultimately, it was just to keep the door to biological parenthood open. There are other variables involved for me personally- I idolize my father as a parent, and am uncertain of my sexuality. But even disregarding this, why would we want to eliminate the option? Transitioning is so emotionally charged, and I know it's easy to write off and react strongly to typically male roles. But the decision to have a child (or in this case, the opportunity to,) is something you will live with. Our perspectives change with time and circumstances. This is at least why I decided to bank; I'd prefer to spend the time and money to allow the opportunity, rather than lose it entirely (as far as biological parenthood goes). I will say, though, this was the most psychologically scarring event of my transition so be prepared.
I apologize if this didn't answer the question, but I wanted to offer my two cents. If anyone has any questions, feel free to send me a pm.
*Additionally, as for sexuality, there is always surrogacy, which is fairly common for couples who cannot conceive.