They’ve got elections on the 22nd (next Sunday). Front runner Miley essentially said he wants to ditch the Peso and use the dollar. So, bye bye Peso.

If the Central Bank of Argentina closes, there will likely be a free market of banking, with or without the dollar, as described by Ron Paul in the book End The Fed. The dollar, peso, bitcoin and others all compete.

I've read BTC usage is increasing there. 10% or something.

And Millei did not promise to "dollarize"

he promised to allow people to use whatever they want in contracts, be US$ or BTC. he says "dollarize" because it will be the most common choice.