Popularly known as one of the greatest investors of all time, Warren Buffett who has an estimated networth of about $85 billion gave an important advice about 30 years ago, were he spoke about fear and greed in the market describing them as "epidemics".Buffett wrote about fear and greed among investor were he stated that his goal to deal with these "epidemics" was to be fearful when others are greedy and to be greedy when others are fearful". Buffett's definition of greed was stated as part of the advice were he wrote about being greedy when others are fearful,meaning he was buying stocks at an opportunistic time.A time like now when others are fearful.