A middleman in the gold trade holds a scale he uses to weigh gold brought in by artisanal miners in Mongbwalu in northeastern Democratic Republic of Congo, November 15, 2016. (Photo by Aaron Ross/Reuters)





Stacks of 100 bolivar notes are seen in a plastic crate at a stall in a street market near Venezuela's Central Bank in Caracas, Venezuela December 16, 2016. (Photo by Marco Bello/Reuters)





A woman holds newly designed Indonesia Rupiah banknotes after exchanging her old bills at a Bank Indonesia mobile bank in Jakarta, Indonesia December 19, 2016. (Photo by Fatima El-Kareem/Reuters)





A man holds a bag of bond coins withdrawn from a bank in central Harare, Zimbabwe December 19, 2016. (Photo by Philimon Bulawayo/Reuters)





An employee counts Egyptian pounds in a foreign exchange office in central Cairo, Egypt December 27, 2016. (Photo by Mohamed Abd El Ghany/Reuters)





A vendor holds coins of 50 bolivar and a 50 bolivar note for a photo, in a street stall in downtown Caracas, Venezuela December 29, 2016. (Photo by Marco Bello/Reuters)





A notice is pasted at a shop stating the refusal of the acceptance of the old 500 and 1000 Indian rupee banknotes and acceptance of the new 500 and 2000 Indian rupee banknotes, in Allahabad, India, November 10, 2016. (Photo by Jitendra Prakash/Reuters)





A Malawian trader counts money as he sells maize near the capital Lilongwe, Malawi, February 1, 2016. (Photo by Mike Hutchings/Reuters)





A man buy eggs using a U.S. one dollar bill at a market in Harare, Zimbabwe on June 17, 2010. (Photo by Philimon Bulawayo/Reuters)





A man holds 500 banknotes notes for a photo in Caracas, Venezuela January 16, 2017. (Photo by Marco Bello/Reuters)





A man sells towels along a road in Lagos, Nigeria December 24, 2016. (Photo by Akintunde Akinleye/Reuters)





Bundles of Somalian currency (shillings) are seen displayed at an open-air forex bureau in Somalia's capital Mogadishu, January 27, 2016. Global watchdog Transparency International said on Wednesday its latest annual Corruption Perceptions Index report showed pervasive public-sector corruption around the world. Sixty-nine percent of 176 countries scored below 50 on the index scale of 0 to 100, with 0 perceived to be highly corrupt and 100 considered “very clean”. Denmark and New Zealand performed best in 2016, with scores of 90. Somalia remained the worst performer with a score of 10, followed by South Sudan, with a score of 11. (Photo by Feisal Omar/Reuters)





A man wears U.S. dollar sign rings in a jewellery shop in Manhattan in New York City November 6, 2014. (Photo by Mike Segar/Reuters)





New two pence coins are seen at The Royal Mint, in Llantrisant, Wales, Britain, January 25, 2017. Picture taken January 25, 2017. (Photo by Rebecca Naden/Reuters)





A man walks past a board of Sri Lankan currency presented by Central Bank in Colombo, Sri Lanka February 7, 2017. (Photo by Dinuka Liyanawatte/Reuters)





Thai baht banknotes are seen next to gold offered for sale in a gold shop in Bangkok's Chinatown April 19, 2013. (Photo by Damir Sagolj/Reuters)





A bank clerk counts Lira banknotes before they are due to be destroyed in Banca d'Italia in Palermo, Italy February 28, 2002. (Photo by Tony Gentile/Reuters)





Dollar signs are seen alongside the signs for other currencies at a currency exchange shop in Hong Kong, China, November 1, 2014. (Photo by Damir Sagolj/Reuters)





A newly designed 2-Euro coin is pictured during a presentation at the Chancellery in Berlin, Germany February 10, 2017. (Photo by Hannibal Hanschke/Reuters)





Children look at bank notes from all over the world in the Money Museum in Frankfurt, Germany, Thursday, December 15, 2016. The museum was reopened after two years of renovation. (Photo by Michael Probst/AP Photo)