2 Dollars - Charles III Amanda Nunes

Niue has long operated as a licensing vehicle for the New Zealand-backed commemorative coin industry, issuing collector pieces under its nominal sovereignty that are designed, struck, and distributed entirely outside the island. This Amanda Nunes piece belongs to a series honoring UFC champions — Nunes, a Brazilian mixed martial artist, held simultaneous bantamweight and featherweight titles, a double-champion status only two fighters in UFC history had achieved at the time of her first title run.

Gold-plated .999 silver at this weight puts it squarely in the one-troy-ounce bullion-format commemorative category — technically legal tender in Niue at two dollars, redeemable by nobody.