Originally Posted by DarthSkywalker
I don't think it is ever outright said. But considering who was hiding it and all the imagery, what I got from the situation that they were an ancient order who worshiped Odin. Perhaps because he proved his "Godliness" and/or saved them at some point. Then at some point he entrusted them with the Cube for whatever reason. Remember, it is "the power of the Gods".
Skull said something about Odin hiding it on Earth. Not that he'd really know for sure, but it makes some sense (albeit a very small amount). Earth kind of seems like the cosmic ghetto from what we learned about in Thor. Maybe not the first place someone like Thanos would have gone looking.