That is the best metal investment you can make. In difficult times, it will be so valuable you won’t even exchange any of it. Merely showing it to people will get you what you want.
In difficult times, merely showing it to people (e.g., a border guard with whom you are negotiating for passage; a street urchin looking to hook you up with some needed supplies; etc.) can get you coshed and lying in the gutter.
Regards,