A bulldozer collects money given by the tourists voluntarily after watching the performance at Song Dynasty Town on August 9, 2015 in Hangzhou, Zhejiang Province of China. Tourists paid voluntarily at any price they liked after watching the performance which had an original cost of 300 RMB (about 48.33 USD) at Song Dynasty Town on August 9 in Hangzhou. (Photo by ChinaFotoPress/ChinaFotoPress via Getty Images)

A casino financier wearing rings and with painted fingernails, counts money she collected from a gambler only moments before, in Angeles city, north of Manila, Philippines, in this May 25, 2015 file photo. (Photo by Erik De Castro/Reuters)

A picture illustration shows Mexican pesos and U.S. dollars banknotes in Mexico City July 6, 2015. Latin American currencies weakened after Greece overwhelmingly rejected a bailout offer from creditors, though moves were muted as investors bet the fallout would be limited. Nearly every currency dropped against the dollar. (Photo by Edgard Garrido/Reuters)

Malaysian ringgit notes of different denominations are seen on top of U.S. dollar notes in this file photo illustration taken in Singapore on March 14, 2013. The Malaysian ringgit hit a 16-year low on July 6, 2015 after reports linked the country's prime minister to probes into alleged corruption, while most emerging Asian currencies slid as Greeks rejected austerity measures for bailout money. (Photo by Edgar Su/Reuters)

A vendor gives a five Euro bank note back to a customer at the central market in Athens, Greece, July 8, 2015. (Photo by Christian Hartmann/Reuters)

A customer counts his money before paying at a fish market in downtown Caracas, July 11, 2015. (Photo by Jorge Dan Lopez/Reuters)

A teller at Bank Indonesia counts out Rupiah bank notes at their headquarters in Jakarta in this October 27, 2014 file photo. (Photo by Darren Whiteside/Reuters)

A waiter counts Venezuelan bolivar notes, corresponding to the bill for a lunch of 4 people, at a restaurant in Caracas July 14, 2015. The bill was 13,126 bolivars, equivalent to 2,067 U.S. dollars at the official exchange rate of 6.3 bolivars per dollar or approximately 20 U.S. dollars according to the black market exchange rate. A debilitating recession and a drop in oil prices have harmed the OPEC nation's ability to provide dollars through its complex three-tiered currency control system, pushing up the black market rate at a dizzying speed. The bolivar sank past 600 per U.S. dollar on July 9, 2015, compared with 73 a year ago, according to anti-government website DolarToday. (Photo by Carlos Garcia Rawlins/Reuters)

Workers count kyat banknotes at the office of a local bank in Yangon in this April 2, 2012 file photo. Citigroup Inc and Standard Chartered Plc are set to advise Myanmar on its first credit rating, according to people with direct knowledge of the matter, paving the way for the country to issue its maiden international bond. (Photo by Soe Zeya Tun/Reuters)

A teller at a Bank Mandiri branch handles Indonesian Rupiah currency during a transaction in Jakarta July 20, 2015 in this photo taken by Antara Foto. The Indonesian rupiah hit a fresh 17-year low on July 23, 2015, as solid U.S. housing data added to expectations the Federal Reserve with hike interest rates as soon as September. (Photo by Wahyu Putro/Reuters/Antara Foto)

A vendor (R) takes Russian rouble banknotes from a customer buying sausage produced on a local private farm, at a street food market in the Siberian city of Krasnoyarsk, Russia, July 29, 2015. The Russian rouble opened 0.8 percent stronger against the dollar on Wednesday after the central bank said it stopped carrying out FX interventions from July 28 because of increased market volatility. (Photo by Ilya Naymushin/Reuters)

A local businessman, the owner of a tourist camp, counts Russian roubles earned during the weekend at a tourist base outside the Siberian city of Krasnoyarsk, Russia, August 9, 2015. Russia's largest gas producer Gazprom beat expectations with a 71 percent jump in first-quarter net profit after weakness in the rouble more than compensated for a drop in sales volumes to Europe. Gazprom's prices for gas sold to Europe are linked to the price of oil, but a time lag of several months means that its sales in the three months to March 31 were at prices pegged to oil at almost twice its January level of around $50 a barrel. (Photo by Ilya Naymushin/Reuters)

A picture made available on 17 July 2015 of a counterfeit banknote vaguely resembling a 10 euro note, which a pub owner indeed accepted, as counterfeit banknotes are presented at the German federal bank Bundesbank in Frankfurt Main, Germany, 15 July 2015. Some 450,000 counterfeit euro banknotes were seized worldwide in the first half of 2015, acording to the European Central Bank (ECB). (Photo by Boris Roessler/EPA)

In this March 15, 2012 file photo, a Chinese woman poses for photos near a sculpture depicting a Chinese yuan note at an art district in Beijing, China. China devalued its tightly controlled currency on Tuesday, August 11,2015, following a slump in trade, triggering the yuan's biggest one-day decline in a decade. The central bank said the yuan's 1.3 percent fall was due to a change aimed at making its exchange rate controls more market-oriented. But any change raises the risk of tensions with China's trading partners. (Photo by Ng Han Guan/AP Photo)