I'm not going to tell anyone what to do with their hair. I just wanted to share an old joke.
The husband comes home and first thing he sees, his wife had her long hair cut off.
"How do you like my new haircut?" She asks. "This greyish long hair made me look so old. But I don't look like an old woman any more, do I?"
"No", the husband answers. "Now you look like an old man."
Please don't throw stones at me:) BTW, I think it's perfectly fine to dye the greying hair some nice colour. Preferably using natural dyes like henna.