The “billionaire(s) capital of the world” is the city where the most billionaires live. This is not always New York City, although New York is usually in the top five. Forbes (an American magazine) and Hurun (a Chinese research institute) have made billionaires lists.
   
“Moscow overtakes New York as the billionaires’ capital of the world” was printed in The Independent (London, UK) on May 14, 2004. “As London emerges as the billionaires’ capital of the world” was printed in the Evening Standard (London, UK) on December 6, 2006. “Twelve months ago Moscow overtook New York as the billionaire capital of the world” was posted on the newsgroup talk.us.rhode-island on March 11, 2009.
 
”#New York is officially the ‘Billionaire Capital of the World’ as 84 of the #Hurun #Billionaires live in the ‘Big Apple’” was posted on Twitter by Brijesh Lavu on March 2, 2014. “Move over, New York City: Beijing is the new ‘Billionaire Capital of the World’” was printed in the Baltimore (MD) Sun on February 25, 2016. “New York is still the billionaire capital of the world. But Hong Kong and other cities are catching up fast” was posted on Twitter by CNBC on May 19, 2018. “Billionaire’s paradise! NYC is named the billionaire capital of the WORLD as the Big Apple houses 136 ultra wealthy residents - beating out Hong Kong and London” was printed in the Daily Mail (London, UK) on June 12, 2023.
   
       
Newspapers.com
14 May 2004, The Independent (London, UK), pg. 32, col. 1:
Moscow overtakes New York as the billionaires’ capital of the world
In February, there were 25 billionaires. Three months later there are 36. With Communism dead, Russia’s expanding elite leaves the west looking in need of lessons in capitalism, writers Andrew Osborn
   
Newspapers.com
6 December 2006, Evening Standard (London, UK), pp. 32-33 headline:
As London emerges as the billionaires’ capital of the world, we look at the small army of advisers and fixers who are providing the uber-wealthy with everything from bodyguards to yachts
William Cash
 
Google Groups: talk.us.rhode-island 
The world now has fewer bilionaires than before
PetiteCapri
Mar 11, 2009, 10:03:28 PM
(...) 
Twelve months ago Moscow overtook New York as the billionaire capital of the world, with 74 tycoons to New York’s 71. Today there are 27 in Moscow and 55 in New York.
     
Twitter
Brijesh Lavu
@titan99bijou
#New York is officially the ‘Billionaire Capital of the World’ as 84 of the #Hurun #Billionaires live in the ‘Big Apple’.
1:54 AM · Mar 2, 2014
   
Twitter
Chicago Tribune Business
@ChiTribBiz
New York is no longer the “Billionaire Capital of the World” http://trib.in/1SU0XHo
10:22 AM · Feb 24, 2016
 
Newspapers.com
25 February 2016, Baltimore (MD) Sun, pg. A8, col. 2:
Beijing overtakes NYC as
‘Billionaire Capital of the World’
Move over, New York City: Beijing is the new “Billionaire Capital of the World.” The Chinese capital has overtaken the Big Apple as home to the most billionaires—100 to 95—according to Hurun, a Shanghai firm that publishes a monthly magazine and releases yearly rankings and research about the world’s richest people and their spending habits.
   
Twitter
CNBC
@CNBC
New York is still the billionaire capital of the world. But Hong Kong and other cities are catching up fast.
cnbc.com
The 10 cities with the most billionaires
New York is still the billionaire capital of the world. But Hong Kong is catching up fast.
12:34 PM · May 19, 2018
 
Insider 
Beijing has surpassed New York City to become the new billionaire capital of the world
Katie Warren Apr 7, 2021, 1:33 AM EDT
. Beijing is now home to more billionaires than New York City for the first time, per Forbes.
. The Chinese capital gained 33 billionaires in the past year, bringing its total to 100 — one more than New York City’s 99.
. The US still has more billionaires than anywhere else, but China minted more billionaires in the past year than any other country.
 
Daily Mail (London, UK)
Billionaire’s paradise! NYC is named the billionaire capital of the WORLD as the Big Apple houses 136 ultra wealthy residents - beating out Hong Kong and London
. New York is homes to 136 billionaires, according to new analysis of 2022 figures
. San Francisco and Los Angeles also made the top ten, boasting 84 and 58 billionaires respectively
. The report by Wealth X found there had been a two percent drop in the number of billionaires overall
By HELENA KELLY CONSUMER REPORTER FOR DAILYMAIL.COM
PUBLISHED: 17:33 EDT, 12 June 2023 | UPDATED: 17:40 EDT, 12 June 2023
   
Kerosi Blog (Kenya)
New York City Is The Billionaire Capital Of The World As It Revealed There Are 136 Billionaires
PD JUNE 14, 2023; MD JUNE 14, 2023 BY EDITOR-IN-CHIEF
New York City has been named the billionaire capital of the world after it emerged that there are 136 billionaires. This is a group of super wealthy people in the city.
 
NYC is standing a head of Hong Kong, Moscow and London which were ranked 2nd, 3rd and 4th respectively. The data was compiled by a data company named Altrata and Wealth X using data from 2022.