As to the constitutionality of Trumps order, it certainly isn't as definitively unconstitutional as you seem to think it is.
https://www.theglobaltreasurer.com/2025/02/10/trump-orders-t...
Robert K. Triest, an economics professor at Northeastern University, noted that while a full discontinuation would require legislative approval, the Treasury Secretary might have some discretion to halt production.
“The process of discontinuing the penny in the U.S. is a little unclear. It would likely require an act of Congress, but the Secretary of the Treasury might be able to simply stop the minting of new pennies,” Triest explained.