Bubbles as a metaphor and compulsion:
Why is the bubble so symbolic? We talk about all kinds of bubbles: soap bubbles, real estate bubbles, the tulip bubble, the internet bubble, bond bubbles, all kinds of financial bubbles.
Other examples of how soap bubbles have been used include these magazine covers:
For some folks, bubbles capture their creative instinct, for others, bubbles satisfy their destructive compulsion.
Bubbles = universal appeal !