I've had three attempts to rob me over the last year. None successful, so far. Once on the subway in Buenos Aires, once in Bucharest, and the last a couple of weeks ago in Quito, Ecuador. Two pickpockets, and the latter was a "run up from behind and try to grab something out of my front pocket". Exciting for sure. In general, I try to take only a small amount of money when I go out, so that at worse I lose $50-$200. No credit cards unless I'm going to take money out, and rarely my passport or other valuables.