Money

Two gallery assistants pose with '$, 2001' an installation by Tim Noble and Sue Webster which is going on show at Sotheby's with an estimated value of  100,000- 150,000 on June 8, 2015 in London, England. The installation forms part of an exhibition of 21 works inspired by the US Dollar which are estimated to have a total value of  50 million and will go under offer by the auction house on 1st and 2nd July 2015

Mary Turner/Getty Images

Two gallery assistants pose with ‘$, 2001′ an installation by Tim Noble and Sue Webster which is going on show at Sotheby’s with an estimated value of £100,000- £150,000 on Monday in London, England

A boy wears sunglasses with the dollar sign as he walks down a street in Bujumbura, Burundi April 29, 2015.

Thomas Mukoya/Reuters

A boy wears sunglasses with the dollar sign as he walks down a street in Bujumbura, Burundi on Wednesday

People are silhouetted as they walk past the columns of the Bank of England in the City of London...People are silhouetted on a sunny morning as they walk past the columns of the Bank of England in the City of London, May 19, 2014. Sterling eased on Monday, on growing talk the Bank of England will step in to cool the UK housing market, which would allow the central bank to keep interest rates lower for longer to sustain recovery elsewhere in the economy.

Andrew Winning/Reuters

People are silhouetted on a sunny morning as they walk past the columns of the Bank of England in the City of London. Sterling eased on Monday, on growing talk the BoE will step in to cool the UK housing market, which would allow the central bank to keep interest rates lower for longer to sustain recovery elsewhere in the economy

An elderly woman participates in a protest in New Delhi, India, Wednesday, Nov. 27, 2013. The protesters demanded a universal old age pension for those above 60 years of age,  opposing the central governmentís proposal of US$ 3 per month. India is home to 142.9 million elderly, aged above 54 years. (AP Photo/Manish Swarup)

Manish Swarup/AP

An elderly woman participates in a protest about pensions in New Delhi, India. India is home to 142.9 million people aged 54 years or above 

A homeless man sleeps on the ground in L...A homeless man sleeps on the ground in Lisbon on July 3, 2013.  AFP PHOTO/ PATRICIA DE MELO MOREIRAPATRICIA DE MELO MOREIRA/AFP/Getty Images

Patricia Del Melo/AFP

A homeless man sleeps in Lisbon, Portugal