I'm posting these pics of Kaya. I'm not sure what to do with her top knot hair. The pics show how she looks most of the time.

Her hair is extremely fine and thin. Topknots don't stay in well cause of the fineness (is that a word?) of her hair. The topknot hair is also not is super shape.
So, do I lop it off or keep it? She is almost 16 months old and the last time it was cut is when she was 6 mos. old by her previous mom.
Would it look stupid if I cut it because her hair is so thin? I know when Yorkies have very fine, thin hair, shorter cuts really don't do them justice. Anyway, I'm just considering cutting the topknot hair, not the rest of her.
Please give me your opinions and if anyone has pics to share concerning this, I'd be grateful!