In reply to KaWai:
i must admit interesting question,
first thing, the word pop culture does not conjour up any image that i can see within architecture of culture today,
i say architecture, mainly because different aspects of culture today, is fragmented, secular, so of it as different as oil and water,
but all sitting within todays rhythm of social existence and interaction,
a symbol of it would have to be a fragmented, disjointed, counter intuitive symbol.
and like a post above mentions its quit simply £, or capitalism