Only the Supreme Court can declare something unconstitutional That is certainly the now common claim, but it will not hold. For as the Texas sodomy ruling, and rulings like roe v wade, the connecticut condom ruling and such ... it makes the Supreme Court mightier and sovereign than the other four branches, The four branches are the Federal Executive, the Federal Legislative, the States by consentinng legislative decrees, and the People, assembled.
At the current state, the States or People could pass a marriage amendment and the Supreme Court could ruin it, directly or indirectly, say by fiat, defining strangely the terms man and woman for the purposes of legal marriage, or by declaring it's process invalid against some infinite array of arcane details of process.
The Court rules by fiat.
And there's that word again "FIAT".
You slight gold too much. Gold is immune to any "fiat" declarations, Honest and humble, is its whole intrinsic nature. Beautiful and uncommon, too.
Both fiats are ships headed to the breakers of a rocky northen coast, the wind behind them and the tillers wrecked. .
Actually the Congress is still supreme over the Court through the "Exceptions Clause," Article III, Section 2, paragraph 2, but it is too cowardly to use it.
I have no clue what you mean by "consenting legislative degrees" but there is nothing in the Constitution which gives the states any ability to pass laws counter to federal law.
Supplies of gold simply cannot grow fast enough to provide sufficient liquidity to allow the economy to have a sufficiently high growth rate to be acceptable to the modern electorate. Over the last 500 yrs (including the massive, one-time, never to be repeated influx from the New World) at barely over 1%. This would mean falling prices and permanent recession with high unemployment. No modern government will accept that condition.
Fiat is not the proper description for currency since it means "let it be." Faith is the significant aspect of currency. For example, Hamilton's debt funding scheme made it as good as gold not because he said "let it be" but because pledging the word of the US government (people) that it would redeem its pledge. This created faith in the debt/currency and thereby value the equivalent of gold.