The beauty of Cash for Gold is they offered you less then half the value of your gold so even if the price dropped they win anyway. Around my town there are just as many signs on buildings "Buying Gold" as there are check into cash places. The funny thing is when people go to sell their gold jewelry they find out (even with the huge spike in gold prices) they overpaid a bunch and still can't get much money back. And if you purchased a gold ring with a diamond in it they toss the diamond back to you since it is worthless.



Aluminum is going to be used for a very long time because of how easily it is shaped, strength vs weight, and easy to recycle so it will have some value even when everything else is made of composites (polymers, carbon).