Gee, let’s ask the simple questions first.
— Why exactly is our current money “unconstitutional”?
— What would constitute “going back to constitutional money”? Be precise.
Geez, try being polite. It goes a long way in a discussion. The answer is of course in the Constitution. Our current money is unconstitutional because it is fiat paper money, and is not backed by anything. The framers of the Constitution specified that only gold and/or silver could be used as money. The reason why is because if there is a printing press available to print money, governments inevitably print what they need/want, and the currency is devalued to the point of worthlessness. They knew this from experience because they printed “Continentals” during the war and it got so bad there was a saying: “not worth a Continental”. Going back to Constitutional money would mean at the very least stopping the printing presses completely and going on some kind of gold standard, or even a gold/silver hybrid of some sort. The devil is, of course, in the details.
Because it is not Gold, or currency backed by gold.
"What would constitute 'going back to constitutional money?'
Coining money with appropriate intrinsic value, and printing currency backed by gold.