FYI: (If link doesn't take, Google article title.)
The title of the world's worst-performing currency is a surprisingly competitive contest this year. As it stands, Argentina's peso holds the crown, having lost more than half its value since January. Right behind is the Turkish lira. South Africa's rand also makes it into the top five. While there are certainly distinct, home-grown problems at fault, each crisis serves as a reminder that the US dollar remains the singularly dominant global currency and will remain so for some time.
Regards,
Ted
https://ftalphaville.ft.com/2018/09/05/1536123600000/One-more-reminder-that-the-US-dollar-is-dominant/