How Centimillionaires Invest: 7 Mistakes to Avoid & 5 Rules the Ultra-Wealthy Follow

7 Costly Mistakes Ultra-Wealthy Investors Still Make

- Becoming the largest client of a tiny advisor or a tiny client at a giant bank

- Overpaying institutional fees for basic, index-style portfolios

- Treating investing as the “center” of the solution instead of one part of a complex life

- Ignoring global tax, legal, and regulatory complexity as wealth goes cross-border

- Standing in “long lines” and piling into crowded trades (including parts of the AI boom)

- Underestimating how much complexity is on the life side, not just the portfolio side

- Confusing “wealth on paper” with real liquidity, flexibility, and options

5 Rules Centimillionaires Follow That Most Investors Don’t

- Make decisions quickly, don’t over-regret, and keep moving forward

- Treat the founder-CEO as an asset class...and back people, not just products

- Obsess over scale and “highest and best use” for their own time and their team’s

- Use relationships as leverage: advisors, operators, co-investors, and peers

- Build or partner with a multi-family office to protect time, privacy, and attention