Plutonium is not rich, it is so named merely because it is Neptunium's neighbour in the periodic table just as Pluto is Neptune's neighbour in space. Pluto the dog of Disney is named after the planet, or at least he got the name only a few months after the planet, so there must have been some connection.
Finally, Operation Pluto was part of the D-Day landings and stood for Pipelines Under The Ocean.
And with that, this series on planets drifts off into the Kuiper Belt like some lachrymose extra from 2001: A Nine-Year-Old Space Odyssey.
The Inky Fool begs for a loan
P.S. A philoplutary is a lover of money
P.P.S. Anyone considering leaving a comment about how Pluto isn't a planet no more, can take that thought, cover it in brambles, and stick it where the sun only shines very, very faintly.