Exactly, it's a question of relativity. Just how many savings options does the average Argentine have? USD aren't failsafe (what investment is?), but they are far more stable than the peso, widely accepted throughout the world, more accessible to Argentines than other hard currencies (such as the pound), and a lot easier to squirrel away than precious metals (I don't know anything about buying or selling gold in Argentina, but in the country of inside-job salideras and home invasions, I'd be terrified.) I have Argentine friends that are just as happy with euros as they are with dollars - it's just a matter of which one is easier for them to get their hands on.
Add to that extremely limited investment options, stock market off limits to most, and even so it's very small here, gold as was discussed in another thread here isn't really even worth it -- by law Argentines are only allowed to buy Argentine gold -- which is not recognised on a global scale. It sounds equivalent to buying a kirchner-backed bond -- it has value, until it's worth less than the paper the certification is written on. (Thanks to dennisr/splaying et alia for explaining )
Recently luxury car sales are going through the roof (limited of course to the few that have stuck around in Argentina) -- it's become another investment that people hope will hold it's value.
You can buy gold in Argentina. The funny thing is, it must be genuine certified Argentine gold. NO IMPORTED GOLD permitted. How they are able to distinguish Argentine gold bullion from say Canadian gold bullion is beyond my very limited knowledge. Know a fine jeweler and he just rolls his eyes when we talk about it.