This is actually a card that comes up a lot for me in readings - not to represent me, quite (that remains, I'd say, primarily the Queen of Swords) but rather...my approach to life, generally.
The knights, you see, are about doing. About going forth, acting, getting things done. The knight of swords is passionate and rash - he flings himself towards whatever captures his attention at the moment, heedless of who might get hurt. Sometimes you really do need to just GO after something like that, without overthinking, with everything you have but that card comes up for me more as what I should be doing than any tendency I actually have. The knight of cups is a dreamer, the romantic, ruled by his heart, ruled by idealism. The knight of wands is passionate too, but more measured, more pursuing ambitions and goals than the impulsive sword knight.
But the Knight of Coins? The knight of coins goes forward steadily, slowly, more weighed down by his armor, careful of his footing. The knight of coins moves forward mindful of his duties, his obligations. The knight of coins moves forward because he must. It is a pragmatic forward-movement...if passion isn't there today that's alright - there is routine, there is this map, there is this or that short term goal to move towards. If there is mud in the road you plod forward nonetheless. You trudge. You muddle through. Keep calm and carry on. If you cannot manage ambition, or idealism, or passion it's alright - there is necessity to keep you moving.
Perhaps he goes slower than the other knights, not motivated the way they are by those strong feelings, calls, but neither is he as easily stopped. The ambitious can burn out; the idealistic can become disillusioned; the impulsive can get distracted. But the one who moves forward out of a grim sense of MUST, MUST, MUST? Pragmatic necessity is not so easily dispelled. Do you feel sick today, exhausted? Get up anyway. Have a cuppa. Go do what you need to do. Do you feel apathetic towards everything? Get up anyway. Pretend. Go to what you need to do. Did something you were hoping for not work out? Disappointed, sad? Shrug it off, go focus on what you need to do. And so on.
And sometimes you find that, having far fewer passions, dreams, ambitions - lacking real motivation and energy and drive, that kind of joie de vivre that so many people seem to have - when you step back and look, you see that you've accomplished just as much if not more than quite a few of them anyway. Why? Because you don't let all that distract you. Like this knight, you can take or leave all of it. At the end of the day, regardless, you put on that big suit of armor, grab your coin-shields, get on your faithful horse and plod on anyway. And you keep plodding, and keep plodding, and keep plodding forward. Step by step, day by day.