Answer:
It belongs to you, but other people use it more than you do. What is it?
What comes down but never back goes up?
What has many keys but cannot open a single lock or door?
What is as light as a feather, but not even the strongest man on earth can't hold it for more than 1 c)minute?
When I type I tap these on the keys
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.