A souvenir vendor displays what he said was North Korean money at the bank of the Yalu river in China's Dandong, Liaoning province, opposite North Korea, September 11, 2016. (Photo by Thomas Peter/Reuters)





Bank of England governor Mark Carney tests a new polymer five pound note as he buys lunch at Whitecross Street Market in London, Britain September 13, 2016. (Photo by Stefan Wermuth/Reuters)





Customers are seen at a counter inside the Bank Indonesia complex in Jakarta, Indonesia, December 16, 2015. (Photo by Darren Whiteside/Reuters)





A man walks past a currency exchange bureau advertisement showing an image of the U.S. dollar in Cairo, Egypt October 13, 2016. (Photo by Mohamed Abd El Ghany/Reuters)





Platinum bars are stacked at the safe deposit boxes room of the ProAurum gold house in Munich, Germany March 6, 2014. (Photo by Michael Dalder/Reuters)





Palestinian women walk past a money changer in the West Bank city of Ramallah February 16, 2010. (Photo by Mohamad Torokman/Reuters)





A man holds up for a picture a one hundred trillion Zimbabwean dollars note inside a shop in Harare, Zimbawe, June 12, 2015. Hyperinflation in Zimbabwe was a period of currency instability that began in the late 1990s shortly after the confiscation of private farms from landowners, towards the end of Zimbabwean involvement in the Second Congo War. During the height of inflation from 2008 to 2009, it was difficult to measure Zimbabwe's hyperinflation because the government of Zimbabwe stopped filing official inflation statistics. However, Zimbabwe's peak month of inflation is estimated at 79.6 billion percent in mid-November 2008. In 2009, Zimbabwe stopped printing its currency, with currencies from other countries being used. In mid-2015, Zimbabwe announced plans to have completely switched to the United States dollar by the end of 2015. (Photo by Philimon Bulawayo/Reuters)





A waitress presents a plate with various Swiss Franc coins and notes in this picture illustration in a restaurant in Zurich, Switzerland, May 21, 2013. (Photo by Michael Buholzer/Reuters/Illustration)





A Saudi man shows Saudi riyal banknotes at a money exchange shop, in Riyadh, Saudi Arabia, January 20, 2016. (Photo by Faisal Al Nasser/Reuters)





A Saudi money changer, pictured through a glass, arranges U.S banknotes at a currency exchange shop in Riyadh, Saudi Arabia September 29, 2016. (Photo by Faisal Al Nasser/Reuters)





Australian coins and notes can be seen in a cash register at a shop in central Sydney, Australia, February 11, 2016. (Photo by David Gray/Reuters)





Farmer Stephen McGrath carries Sterling, Euro and old Irish Punts for any eventuality at the border town of Pettigo, Ireland October 14, 2016. (Photo by Clodagh Kilcoyne/Reuters)





A visitor takes a picture of a commemorative Russian rouble coin from the collection of the museum and exhibition fund of the Central Bank at its headquarters in Moscow, Russia, October 1, 2016. (Photo by Maxim Zmeyev/Reuters)





A vegetable vendor (R) takes money from customer at a morning market in Jakarta, Indonesia, October 3, 2016. (Photo by Reuters/Beawiharta)





A Bank Indonesia employee counts damaged or worn rupiah bank notes exchanged for new ones at the bank's headquarters in Jakarta, Indonesia, December 16, 2015. (Photo by Darren Whiteside/Reuters)





One hundred thousand rupiah notes are seen through a magnifying glass in this picture illustration, March 14, 2013. (Photo by Edgar Su/Reuters)





A pile of one pound coins is seen in a photo illustration shot June 17, 2008. (Photo by Toby Melville/Reuters/Illustration)





Anti-government protesters hold Thai baht banknotes ready to donate to their leader marching in downtown Bangkok February 7, 2014. (Photo by Damir Sagolj/Reuters)





A woman walks past a money exchange bureau showing images of the U.S dollar and other foreign currencies in Cairo, Egypt, October 12, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





A customer pays a vendor at a market in Beijing, China, March 25, 2016. (Photo by Jason Lee/Reuters)





People display portraits of Thailand's King Bhumibol Adulyadej on Thai baht notes as they wait on the roadside while his body is being moved from the Bangkok hospital where he died to the Grand Palace, in Bangkok, Thailand, October 14, 2016. (Photo by Chaiwat Subprasom/Reuters)





A carnival reveller takes part in the “Rosenmontag” (Rose Monday) parade, the highlight of the annual carnival season in Cologne, Germany February 8, 2016. (Photo by Wolfgang Rattay/Reuters)





A fishmonger makes a sale at a market in Kuala Lumpur August 14, 2010. (Photo by Bazuki Muhammad/Reuters)





Gold alloy bars are seen at Altyntau gold mine extraction factory outside northern Kazakhstan's town of Kokshetau June 13, 2013. (Photo by Andrey Lunin/Reuters)





A shop cash register is seen with both Sterling and Euro currency in the till at the border town of Pettigo, Ireland October 14, 2016. (Photo by Clodagh Kilcoyne/Reuters)





The dollar sign (R) is seen alongside the signs for other currencies above a currency exchange shop in Mongkok shopping district in Hong Kong, China, October 30, 2014. (Photo by Damir Sagolj/Reuters)





A man counts money after withdrawing it from a State Bank of India automated teller machine (ATM) in Mumbai, India, March 9, 2016. (Photo by Danish Siddiqui/Reuters)





A woman counts money in central Lviv, Ukraine, October 20, 2016. Picture taken October 20, 2016. (Photo by Gleb Garanich/Reuters)





A money lender counts Indian rupee currency notes at his shop in Ahmedabad, India, in this May 6, 2015 file photo. (Photo by Amit Dave/Reuters)





A newspaper with a front page advertisment of former 007 star Pierce Brosnan endorsing an Indian mouth freshener, is seen on the streets of New Delhi on October 7, 2016. Former 007 star Pierce Brosnan sparked ridicule on social media October 7, 2016 by starring in a new James Bond-style spoof commercial for an Indian mouth freshener that left fans shaken and stirred. (Photo by Dominique Faget/AFP Photo)





A currency exchange board with washed out rates in London, Wednesday, October 12, 2016. The pound remained volatile, gaining ground Wednesday after the British Prime Minister Theresa May said she would open to parliamentary debate the issue of how the country approaches its exit from the European Union. (Photo by Frank Augstein/AP Photo)





A mourner inserts a commemorative banknote of Thai King Bhumibol Adulyadej in Bangkok, Thailand, Tuesday, October 18, 2016. For Thailand's royalists – and there are millions of them – King Bhumibol Adulyadej will probably long remain embedded as a potent, father-like figure who guided them through turbulent decades and espoused ideals of national harmony, labor on behalf of the poor and the virtues of an agrarian society vanishing in the wake of headlong modernization. (Photo by Sakchai Lalit/AP Photo)