no, they can't make gold, because they don't move elementary particles, they move atoms. gold is an atom, hence they'd need gold to make gold, which isn't a very impressive feat. what would be cool is if they could take simple graphite (pencil lead), and assemble it into diamonds, and make the whole process significantly cheaper than diamonds are today. it could be a real game-changer, and i'd really enjoy seeing diamonds that now cost millions of dollars lose almost all their value, thus screwing over anyone who has made large investments into diamond jewelery. something like this happened with aluminium - it used to be a very expensive metal, because it was difficult to extract it from the ore, so there was a lot of aluminium jewelery. then some guy came up with a new way to extract it, and it became the cheap-ass metal we all know and love today.