A metaphor for something illusory, short-lived or perishable.

The online name "bubble" refers to bubbles or foam-like substances. It can be used to describe something illusory, short-lived or evanescent. Emotionally, "bubble" represents a feeling of vulnerability or unreliability, like a bubble that is prone to bursting. Internet names are used to express the desire for beautiful things, indicating that they are only temporary illusions or cannot last forever.