no mention of Bitcoin in US constitutionArticle 1 Section 10 of the US constitution does mention gold. No State shall enter into any Treaty, Alliance, or Confederation; grant Letters of Marque and Reprisal; coin Money; emit Bills of Credit; make anything but gold and silver Coin a Tender in Payment of debts; pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligations of Contracts,or grant any Title of Nobility.