While you can argue that there is little reason for the dollar to lose strength against the Euro or the Yen, since economic performance and printing of money in Europe and Japan is at par with the US, there is an additional threat looming, which could have severe consequences for the dollar and US economy. This could start playing out soon.

http://investmentwatchblog.com/the-growing-rift-with-saudi-arabia-threatens-to-severely-damage-the-petrodollar/#2CcsbHLfzSdtfbsp.99