Watch for what happens in arizona. there is talk of arizona making gold and silver legal tender in that state which is completely constitutionally acceptable. It is just a matter of other unconstitutional laws passed since then. If there is no interference by the national government and they also do not attempt to hut down bitcoin (very hard, they would have to basically shut down the entire internet or buy every bitcoin themselves), then i dont know what the problem would be legally with having a gold warehouse distributing paper or digital currency.
