Bitcoin exchange rate going up in 3...2...1...
BEcause of the difference between credit card dollars (about 6.20 pesos) and black market dollars ( 9 pesos today, 10 pesos last week) you could buy bitcoins, sell it for dollars and then sell dollars back in the market at 9 pesos.
It is part of the circumstance that argentinians just really love dollars.
I've seen the Old Peso, the New Peso, and the (Newest) Peso (which was an exchange rate of 1000 to one, to remove zeroes from the bills), and I'm only 32 years old.
Same for Brazil, they had the Cruzeiro, Cruzado and Real.
Argentina had several different Pesos (Peso Ley, Peso Fuerte, Peso Convertible) and the Austral.