There are no good alternative currencies. The euro is massively overvalued, and the Europeans are lazy, the dollar is getting devalued, the Japanese have no growth, and their savings are locked up in rotting US debt. You can't trade the Chinese RMB.
The world follows the US footsteps, it is going to be competitive devaluations in a global economy, the US debasing their currency will lead the Europeans, Japs, and Chinese to follow suit to keep up their exports.
In the end, commodities continue going through the roof and inflation goes rampant. But who cares, as long as that Fannie Mae and Freddie Mac are saved and we can continue with the broken business model of selling homes to the poor with easy credit, that don't need to be paid back because government will bail you out.