Answer:
What do people spend a lot of money on every year but never want to use it?
What can travel around the world while staying in a corner?
Timid or weak people are said to not have these.
Is always in front of you but cannot be seen?
You walk into a room with a match, a kerosene lamp and a fireplace. Which do you light first?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.