According to Bloomberg Billionaires, Nigeria's richest man Aliko Dangote lost almost half of his $21billion in 6 months.

Aliko Dangote, owns the Dangote Group which operates in Nigeria and several other countries in Africa, including Benin and Ghana, .
As of October 2014, he had an estimated net worth of $21.3 billion
Dangote is ranked by Forbes Magazine as the 23rd richest person in the world and the richest in Africa. passing Saudi-Ethiopian billionaire Mohammed Hussein Al Amoudi in 2013 by over $2.6 billion to become the world's richest person of African origin
Dangote is ranked by Forbes Magazine as the 23rd richest person in the world and the richest in Africa. passing Saudi-Ethiopian billionaire Mohammed Hussein Al Amoudi in 2013 by over $2.6 billion to become the world's richest person of African origin