In Chapters 10-16 of A Tale of Two Cities, what is suggested by the coin image?

The only reference made to coins is in Book the Second,
Chapter 7.  In this chapter, the Marquis d'Evremonde departs from the ball at the hotel
of the Monseigneur, a gathering where he has been
rebuffed.

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With a wild rattle and clatter, and an inhuman
abandonment of consideration not easy to be understood these days, the carriage dashed
through streets and swept round corners, with women screaming before it, and men
clutching each other and clutching children out of its
way.

As the carriage of the
Marquis rounds one corner, there is a scream and the horses rear in the air.  A tall man
lies in the mud over someone, howling "like a wild animal."  The man rushes the
carriage, and the Marquis puts his hand on the hilt of his sword.  The crowd gathers,
but looks in submission while the Marquis regards them as "mere rats come out of their
holes."

Then, the Marquis complains that the people cannot
take care of themselves and stay out of the way.  Gaspard, the father approaches, crying
"Dead" agains. The Marquis throws the man a gold coin.  When he hears another tell
Gaspard that it is better that the little one die in this manner to live, the Marquis
calls him a philosopher and asks his name and occupation.  Then, he throws another gold
coin to Defarge, telling him to spend it as he likes.  As the Marquis settles back into
the carriage with

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the air of a gentlman who had accidentally
broken some common thing, and had paid for it, and could afford to pay for
it

When his comfort is disturbed by a coin flying into his
carriage and "ringing on the
floor.

While the Marquis
tosses the coin disdainfully to the father of the dead boy, he views the death of a
peasant hardly worth a gold coin, and certainly unworthy of his consideration.  But,
when the coin he feels he graciously gives Defarge is thrown back into his carriage, the
Marquis is insulted.  Defarge tells the Marquis that his money is meaningless to him and
the others, for it will not bring the son of the man back to
life.

Later, payment is sought from the Marquis, and he is
killed in his chateau.  After his death, his face appears in stone on the walls of his
chateau as the gorgon head with the two dents on the sides of his
nose.