Can we please convert blue essence into orange essence...

Right now, I own every champ in the game. That I know of, I can't use blue essence for anything else but champs. Now i'm stacking up all this blue essence but with nothing to spend it on. I wanted to know if eventually it was possible to start converting blue into orange. It doesn't have to be 1:1. It could be like 1000 blue = 100 orange or something. Right now its completely pointless to have it...