Upright the King of Coins is read as abundance, security and disciplined leadership in material affairs; reversed, as materialism, stubbornness, or judgment clouded by attachment to wealth itself.
As a person card, he is conventionally read as a shrewd, generous provider, and readers commonly distinguish him from the Knight of Coins on the axis the Golden Dawn's structure formalizes, his Fire of Earth a mastery already achieved and stabilized, the Knight's Air of Earth a more methodical force still building toward the same result; where the Knight is read as steady but still working, the King is read as steady because the work is largely done.
Waite's own printed meaning, valour, realizing intelligence, business and normal intellectual aptitude, sometimes mathematical gifts, is a more specifically intellectual reading than the practical, provider-focused emphasis most contemporary practice now gives the card, and the shift toward reading him as a grounded businessman rather than a mathematically gifted one reflects the general twentieth-century move toward reading court cards for temperament rather than for specific aptitudes.
The bull imagery on his throne, unique among the four kings for tying the card so directly to one zodiacal sign, is frequently cited by readers as evidence that Smith, even while working from a shared court structure across the suits, individualized each king's setting well beyond what the Golden Dawn's shared elemental titles alone would require.