Valid! I went from gender fluid to binary trans girl, to non-binary trans girl, and finally back to gender fluid. Gender can be complicated but it's always about finding yourself and being happy!
if I had a nickel for the amount of people with which non-binary identification was but a stepping stone for later coming out as binary trans... I'd have like, three or four nickels. Not a lot, but I can go buy a packet of ramen with that.