Prudence is not the same thing as caution. Caution is a helpful strategy when you're crossing a minefield; it's a disaster when you're in a gold rush.
Prudence is foresight and far-sightedness. It's the ability to make immediate decisions on the basis of their longer-range effects.
Prudence is what makes someone a great commodities trader - the capacity to face reality squarely in the eye without allowing emotion or ego to get in the way. It's what is needed by every quarterback or battlefield general.