All money isn't a bubble. If people are known to need certain quantities of an asset to disburse debt and tax obligations they know they will incur in future, then that asset's value isn't driven purely by speculation, especially not if people accept it even as its value is known to diminish over time.

My belief that people and corporations will still have a broadly similar demand for dollars next year isn't based on a graph with a rising value trend line that's known to be driven by amateur speculators, unlike "bubble" type assets.