Money is a notoriously taboo topic so it is actually quite easy to hide your net worth. People won't ask directly about your assets so all that is left is not showing your worth outwardly. Most people display their wealth outwardly with objects like cars, clothes and houses. If those items looks 'cheap' you can give the appearance of not being wealthy. Chuck Feeney, the owner of Duty Free Shoppers, successfully hid his billionaire status for years! He kept his same $10 Casio watch and old clothes his whole life to keep up appearances.