Paper currency has hitherto been regarded with suspicion, as insecure.
The egoist is fooled by no ideals: he discards them or uses them, as may suit his own interest.
Your thoughts and emotions are yours alone.
You are forever alone.
In brief, egoism in its modern interpretation, is the antithesis, not of altruism, but of idealism.
But the egoist has no ideals, for the knowledge that his ideals are only his ideals, frees him from their domination. He acts for his own interest, not for the interest of ideals.