Well, being a King of Coins is a complement. He is a master of materialization, not just making money. However, the "yellow" dot on the King, a requirement at the time for Jews to wear in order to indentify themselves (to be "easier" targets for descrimination and a potpourri of abuses ), is all too reminiscent of the Holocaust and the Star of David required to be worn during World War 11.
Anyway, if Vachetta wanted to have a "real" King of Coins, he should have chosen an image of a Medicci or a Visconti. The ruling classes just used Jews to make money for them, then in bad times they could point the finger at the Jews and make them the scapegoat. They are your opressors! Kill them and you'll be free! Perhaps Vachetta was just being whimsical, however, I don't find any allusion to human suffering to be humorous, no matter what the circumstances happen to be or who the victim happens to be. Some of the engravings of the time, which gleefully show Jews being executed by being hung upside down by one foot usually with a dog or dogs, so that dogs would panic and maul the person adding extra pain to the victim, well!!!-------I'd be irrate if it were just dogs!!! It is cruelty that is just incomprehensible to me. I've heard that the image of the "hanged man" may have been based on this practice. The thought of it just turns my stomach. Leaves me with a real yucky feeling.