The phrase “a bad penny” was referring to one that is counterfit, or underweight. In ancient times, coins had value because of the material they contained. Thus a coin that appeared a bit light could be weighed and if it was found to be light would be worth less.
The different books of the Bible say so many different things that its easy to claim that it says what you want it to say. That’s how you have Christians like Reverend Ed Trevors and Pastor Greg Locke.
The phrase “a bad penny” was referring to one that is counterfit, or underweight. In ancient times, coins had value because of the material they contained. Thus a coin that appeared a bit light could be weighed and if it was found to be light would be worth less.