Gold bugs - the guys obssessed with gold (more like "into gold", the ones that have a more deep knowledge of the subject - gold. Or the ones more prone/biased towards the theory of economy of a country being better off when guaranteed by a gold backing (lastro em ouro).
You got the bug of Economics-speak, eh? Or both, the bug of English and the one of the lingo of Economics, he hee.
Just kidding around here! http://www.thesaurus.com/browse/bug