Now, can someone tell us when the use of "coin" as a verb began? Because the author understandably enjoys this verb selection in the article, when originate or create could have worked equally well
To coin, a verb with the original meaning to create or strike a coin, has been around for centuries; probably as long as the noun "coin" has existed. You will find its use in the American Constitution (Article 1 sections 8 and 10), for example.
In English common law, making a counterfeit coin was a crime, known as "coining". Thus, there was plenty of precedent for "coining" meaning "to make for yourself". In its non-numismatic sense it seems to have originated centuries ago with creating new words and other linguistic changes, as seen in the old now-cliched expression "to coin a phrase". George Puttenham, writing in 1589, noted that young scholars, in an effort to appear sophisticated and educated, "will seem to coin fine words out of the Latin". Shakespeare, in the play Coriolanus
(1609), has a character say "So shall my lungs coin words till their decay".
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis