Beyond its usefulness to historians, the Two of Coins does a specific and rather narrow job in a reading.
The standard sense is the management of two demands at once, and the readings divide on the tone. The competent reading takes the juggler at his word: the querent is handling it, adaptability is a genuine skill, and the card affirms a difficult arrangement that is nonetheless working. The sceptical reading notices that juggling is by definition unstable, that nothing in the picture is at rest, and that the card describes an equilibrium requiring continuous effort to maintain.
The second reading tends to be more useful in practice, because querents rarely consult an oracle about arrangements that are comfortable. A person who draws this card is usually managing something, and the question worth asking is what happens when they stop.
The card also has an old and stubbornly practical association with money in motion, cash flow rather than capital, payments that arrive and leave, and the difference between being solvent and being liquid. That reading is closer to the eighteenth-century cartomancers than to any esoteric system, and it survives because it keeps being right.
Waite's reversed meanings run to enforced gaiety, simulated enjoyment and a message received, which is one of the more peculiar entries in his lists and does not map onto the modern convention at all. Readers who do not turn cards read the strain into the upright picture, where it is already perfectly visible without anyone having to rotate anything.