The Friday File: Through 2020, the level of wealth needed to join the top 1% of the population in a nation was highest in Monaco at $7.9 million. The US was third globally and tops in North America at $4.4 million. Singapore was Asia’s #1 at $2.9 million; in Australia it’s $2.8 million. Argentina was tops in South America at $360,000 and South Africa is the African leader at $180,000.