Amassing and storing resources, money, food or other valuable goods for the purpose of personal use or sale in times of shortage.
Hoarding increases the scarcity of the resource and thereby increases its value.
Hoarding damages the economy by taking goods out of circulation.
Hoarding arises mainly as a hedge against the risk of future shortages and thus accentuates the very problem it is meant to overcome.
Modesty and unselfishness -- these are the virtues which men praise -- and pass by. (Andre Maurois).