LOL. It doesn't matter what form it comes in, it has to combust to move the rocket and combustion demands lots of oxygen, not available in the upper atmosphere let alone "space".
So, what's your point? Rockets only need most of their fuel before reaching space to accelerate and overcome air resistance. Once in space, not as much fuel is needed because there is practically nothing to slow them down. When talking about rocket fuel oxygen is considered part of it, unlike in airplanes where only the non oxygen component is called fuel.