Upright the Eight of Coins is read as diligence, apprenticeship and mastery earned through repetition rather than talent; reversed or in shadow, as perfectionism, cut corners, or skill practiced without purpose.
The reading tradition behind this card is older than its picture. Eighteenth-century cartomancers such as Etteilla worked the pip cards purely from number and suit, and a card of coins at the eight position was read for steady, incremental material progress well before anyone had drawn a bench or a chisel; Smith's craftsman scene gave that older reading a face but did not invent it.
The Golden Dawn material behind the Book T titles was not published in Waite's lifetime as a divinatory guide; it was an internal teaching document, restricted to initiates, and reached a wider public only through Israel Regardie's decision to print the order's papers in 1937 to 1940, against considerable objection from surviving members. Crowley's own account, in The Book of Thoth of 1944, treats Prudence less warmly than Waite's craftsman does, warning against a care so narrow it becomes a fear of ever finishing anything, a reading closer to the card's Virgo decan than to Smith's picture of contented work.
Practically, most modern readers split the difference: the card affirms competence built slowly, and its caution is not against effort but against mistaking the exercise for the goal. A reader who treats every appearance of this card as simple encouragement to work harder is usually missing the second half of what the tradition says about it.