Whatever people are doing to get the pesos, they can do directly for bitcoin instead.
If no one has any bitcoin then no one can work for bitcoin.
Of course, Argentinians could attempt to bootstrap their own cryptocurrency..
Under such circumstances, how is anyone going to keep bitcoin out of Argentina?
I just don't see how enough of them can get in for it to matter all that much.
It's ironic that one of the cryptocurrency experts is Argentinian: http://bitslog.wordpress.com
Remember, money doesn't have intrinsic value. There's no reason a bunch of pissed off middle class educated people can't en masse adopt a new way of trading resources.