It seems to me that a month doesn't go by when one of my friends finds himself in a jam because their card gets compromised and it is the only card that they have. I wouldn't travel across the street let alone travel to or live in a third world country without having several cards and/or multiple avenues to obtain cash,just silly.Overpay my credit card in Canada before my trip, then go to a teller at Santa Cruz and withdraw(100,000 peso limit I think) from the credit card.
I also travel with 2 different debit cards just in case.