Strongly agree, and furthermore the phrase "a bubble" only works as a metaphor if we associate debt with empty air, and therefore the metaphor only works if we

Strongly agree, and furthermore the phrase "a bubble" only works as a metaphor if we associate debt with empty air, and therefore the metaphor only works if we are talking about debt. But the article says that people's savings increased massively during the pandemic, which would be an ahistorical prelude to a bubble.