Hey there!
First of all, 26000 is a pretty big number when it comes to people. We can first notice that a lot of people are pushing for women representation. This is supported by the fact that so many people are nominating a women to do this.
Additionally, it's likely, especially nowadays, people feel like women aren't really portrayed on bank notes and money. Think about it- on the bills you use everyday, there's not usually women.
I can infer that they're trying to make a difference in the world and show what women can do. Their first step is putting women on bank notes.
Hope this helps!