Will Brazil become another Argentina?

Brazil seems to step on world stage:I mean,with World Cup and Olympics become there but now all is in doubt.Riots the once model for Latin America now seems to be falling apart.And Argentina comes to mind,for after fall of the junta the seemly reform government of Menem was gateway for Latin America how things should be done but then things fall apart discontent which lead to Marxist government of the Kircher's and future of bankruptcy.In a wink of eye all is gone the brave new world looks old and tried.