I feel like they are infinite? Because, for example, in hyperinflation, there's no upper bound on how long someone is going to keep printing money.
Any given instance will stop at a finite number, but you can't bank of that being the high water mark.
It's like the notion of a 100-year flood. Of course there could be a tsunami or a dam failure that completely inundates an entire city, but at some point you've got to accept a small risk and ensure you are covered for it.