Answer:
What can be swallowed, but can swallow you?
Though I have neither legs nor feet, my use is for to go; Although I cannot speak, I tell what others want to know
Gold in a leather bag, swinging on a tree, money after honey in its time. Ills of a scurvy crew cured by the sea, reason in its season but no rhyme.
Covered in stone and sun. It's home to many but also none. What is it?
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help. Yet many people are afraid to let me help them.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.