I would take cover and consider that I was most likely in an ambush or that there was a hidden IED near by and get the hell out of there. If find neither then depending on how disparate I was might then consider the worth of sitting up a ambush on the site and relieving some fool of something that I needed.
Since gold is worthless in this scenario, according to you, would not the trap require something of value for bait? Like a can of beans?
So you won't answer the question. I will take that as a yes you would pick up the gold piece and try to barter with it.