Answer:
Many hear me, but no one sees me, and I only speak when spoken to
Thousands lay up gold within this house. But no man made it. Spears past counting guard this house, but no man wards it.
They belong to me; they belong to you; They can make you feel happy or make you feel blue; They never end until the day you do.
I am the outstretched fingers that seize and hold the wind. Wisdom flows from me in other hands. Upon me are sweet dreams, my merest touch brings laughter
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
I am your mother's brother's only brother in law. Who am I?