For the young,
If your hair is white, you can either dye it or leave it alone or go for treatment. But there is anadvantage in having a white hair. You might look old, so when you're on the bus or train, people might just give you a seat, or not.So yeah.
For the old,
You might think that you feel so much better with black hair, but you don't. You look artificial. LOL. So yeah. And you will have disadvantage, cos people think that you are still young. [DUMBASS]. but if you don't, you will have and advantage. So don't be pissed off if you don't get a seat.