In fact there are three freely convertible currencies in the Galaxy, but none of them count. The Altairan Dollar has recently collapsed, the Flaninian Pobble Be

In fact there are three freely convertible currencies in the Galaxy, but none of them count. The Altairan Dollar has recently collapsed, the Flaninian Pobble Bead is only exchangeable for other Flaninian Pobble Beads, and the Triganic Pu has its own very special problems. Its exchange rate of eight Ningis to one Pu is simple enough, but since a Ningi is a triangular rubber coin six thousand eight hundred miles across each side, no one has ever collected enough to own one Pu. Ningis are not negotiable currency because the Galactibanks refuse to deal in fiddling small change. From this basic premise it is very simple to prove that the Galactibanks are also the product of a deranged imagination.[1] [1] hhgttg