If I start identifying as a woman, can I become a world champion in female boxing?

You could give it a shot.

If you were born male, & live in a Fukkt country, yes.

Not a chance. Most of those little girls that are boxing right now will beat the hell outta you.

Maybe. Start on hormones and have bottom surgery and after a while you just might qualify. 

Yep. Identify as a woman. Act like a man.

Unless you physically transition to affirm your gender identity, no.

Transition is a long, expensive, medically monitored process that takes years to accomplish.

Nowadays yep. Everyone would be too scared of a lawsuit to deny you