


This could as well be answered by asking what do we humans need all the gold for? Granted, it can be facilitated for certain technologies, but the more prevalent answer, especially when looking back at history, is really for nothing, but it's rare and shiny! And then to study us, to get into the whole vivisection mythology of aliens as well, we wanted to encapsulate as many of the images of what people think the aliens do when they're here and then, also, to make it a bit horrific. It's the best choice of all the choices and the one I felt was the most poetic. It's either going to be there's here to eat us, which seems silly to me. It's the intersection of where those two things lie and we address it pretty square on. Also, most importantly, if works very well for the metaphor of The Treasure of the Sierra Madre and the gold. So, they would probably have the same logic. We'd be belters, we'd be mining for resources from other places. It's also a useful, malleable, ductile material that might be used by higher order of technology and if we ever go anyplace else, it would be like Outland. If you also say in addition to no faster-than-light travel, that nobody's created transmutation, gold is created in very trace amounts in supernova, so it would be very rare anywhere and rarity would lead to value. If you think of Chariot of the Gods, there's this reoccurring theme of gold. It's about them coming for gold whether that's a simplification or not. If you look at the mythology of aliens, there's a lot about gold. Is there a backstory to why they want gold? Why they needed gold isn't really explicitly explained in the film, but in an interview, director Jon Favreau said:
