Our possessions on earth remain here on earth after we are dead.  But those treasures we have there are those things we bestow or give to those who are in need in love, those things we give to God's work on earth, souls we worn for God.  These are the that we will receive reward for in the Kingdom of God and finally we will spend our eternity with God in a place there will no sorrow or tears but in peace.  These are our heavely treasure.