Gold will remain the preferred commodity in a long run, although we have seen the value plummeted not too long ago, but is now slowly moving up again in value.
I do see Gold will remain the most secured long term investment commodity for investors.
Not far behind will be platinum and surprisingly, Silver too. Keep a lookout for these 2.
@vckc4ever thanks for your reply. These currencies have been consistent since the emergence of trade for thousands of years and they still keep finding ways of remaining very relevant.