OZ copper rounds - true or false

I have some of those heat sinks I just don't have the hart to take apart yet. Yes I have a obsession with copper, The question is when to sell , So many speculators say this and that I also see the potential that copper could go down . I feel there will always be a use no getting around that. But what real future does plastic have in store . I feel plastics , Polymers , Different types of composts (man made ) could minimize the need for copper also . Case in point cars Radiators utilize plastics that probably do as well as the really old brass RAD's How about intake manifolds made of plastic instead of Aluminum . Polypropylene is used with shot guns ,in time that is what i feel will be competition Any time you see some thing that used to be be copper become plastic that is also a reality. Well maybe some day there will also be Plastic Yards . But you never really know if these years now might be the time to sell copper . If copper little by little becomes regulated to wiring some electronics will that be enough . I know China is making massive generators that as of now need lots of copper - completion around 2016 is the prediction I know I am not all that worldly , so I hope there are uses for copper that I know nothing about , that continue to make it a very important base metal and investment.