Like any city, be aware of your surroundings, especially in busy tourist areas. But in general, Buenos Aires is a safe city And its crime is nothing like Rio de Janeiro’s. Petty theft, such as pickpocketing, happens, so keep your items secure.
Use ride-sharing apps or radio taxis instead of hailing them on the street, especially at night.
Getting to and from La Boca is an obvious example of this. There are three or four streets which are clearly aimed at tourists and which are a lot of fun, but the rest of the area is quite frankly quite rough, and you really need a cab to and from; especially at night.
The currency is the Argentine Peso. The exchange rate is, to say the least dynamic, and many visitors find it helps to learn local money exchange methods to get the best value. The US dollar is very much the preferred currency, and you’ll find many shops prepared to accept US dollar cash over pesos. Just do your sums. Make sure you’re getting a reasonable exchange rate.
If you’re really brave (well, foolish) you’ll get a much, much better exchange rate from one of the dodgy blokes hanging around in the city centre offering cash exchange at rates that would be, in theory, extremely beneficial . Just to be clear, this is not a formal Expedition Partners recommendation for currency exchange!