Millionaires and billionaires almost always answer the question What do you enjoy more, making money or spending it? differently, Business Insider's Hillary Hoffower previously reported. The difference between financially successful people (millionaires) and financially super successful people (billionaires) boils down to the fact that the latter get pleasure making money, but don't enjoy spending it, according to Rafael Badziag, an entrepreneur who spent five years conducting face-to-face interviews with 21 self-made entrepreneurs. Billionaire businessmen Michal Solowow — the wealthiest person in Poland — and Lirio Parisotto — the wealthiest person in South America — both credited their savings habits to their financial success, Business Insider previously reported.Facebook CEO Mark Zuckerberg isn't known for his fashion sense, but his uniform of grey t-shirts, blue jeans, and Nikes is more expensive than one might think. Zuckerberg special-orders his shirts from Italian luxury brand Brunello Cucinelli for between $300 and $400 each, Business Insider previously reported. The ultra-wealthy increasingly favor displays of wealth that are discreet, Business Insider's Hillary Hoffower previously reported. They are increasingly investing in luxury travel, wellness and fitness experiences. Millionaires, on the other hand, are more likely to spend their wealth on flashy purchases like designer clothes and bags, Business Insider previously reported. Read more: Mark Zuckerberg's summer involved paddleboarding at his $59 million Lake Tahoe compound and selfies with his wife in Paris. Here's how the CEO spent his time.While speaking at on a panel in July, Brazilian financier Jorge Paulo Lemann said, It's a horror that everybody in Switzerland retires at 60 and thinks it's all right, Business Insider previously reported. Then there's Warren Buffett, who, at age 88, still goes to work every day and said in an interview with the Financial Times that he has no plans to retire. However, the prospect of retiring young is gaining popularity with self-made millionaires, Business Insider's Hillary Hoffower reported. One community of early retirees known for the acronym FIRE — financial independence, retire early — have even developed a unique way of congratulating each other on their retirement. Go f--- yourself, they tell each other, because that's how outsiders tend to respond when FIRE members discuss their financial goals. Read more: The 80-year-old billionaire investor behind AB InBev and Burger King calls it 'a horror' that the Swiss retire at 60, and it's a mindset shared by some of the other biggest names in businessThe average age of an ultra-high net worth individual across the globe is 63.3, according to market research firm Wealth-X told Business Insider. That's nearly five years older than the average age for all high net worth individuals. The average of all people with net worths above $1 million was 58.8 in 2018, according to Wealth-X's 2019 High Net Worth Handbook.Millionaires next door tend to choose less risky investments that perform better in volatile markets, Chirag Thakral, the Deputy Head of the Global Financial Services Market Intelligence Strategic Analysis Group of French consulting firm Capgemini, previously told Business Insider. Billionaires, on the other hand, often include riskier investments like commercial real estate, hedge funds, and private equities in their portfolios. Read more: Billionaires tend to make riskier investment choices than millionaires, and it helps explain why ultra high net worth individuals lost so much of their money in 2018Their equity-heavy portfolios make the net worths of the ultra-wealthy extremely susceptible to market volatility. Approximately $15 billion was wiped off the net worths of Hong Kong's 10 richest people between late July and mid-August as protests upheaved the city's stock market, according to the Financial Times. Li Ka-Shing, Hong Kong's richest citizen, lost $3 billion alone. Li took out advertisements in local Hong Kong newspapers calling for an end to the protests on August 15, The South China Morning Post reported. Read more: The richest man in Hong Kong has lost $3 billion since July, and now he's joining the chorus of wealthy citizens calling for the 10-week protests to endHaving assets in multiple markets doesn't necessarily give the ultra-wealthy an advantage over other investors, Wealth-X Director of Research & Data Analytics Maeen Shaban told Business Insider. The thing about that is that the individuals at this level wealth are very exposed to stock markets, Shaban said, but these individuals are also kind of exploded at a global level. You have wealthy individuals from even markets that experienced a positive performance [in 2018], but they are strongly invested in other markets as you would expect at this level of wealth. So a 20% or 15% drop in the stock market may have a smaller impact on an average investor, but had probably proportionally much bigger impact on an individual at this level of wealth.