Yes, this is exactly what I was thinking! Thank you for the concept!
The only change I would make is that I’d have the chosen background of the pot take up the whole widget. Take for example how this motivation widget has done it in this pic. See how the picture is the background of the widget, with the text on top.
Whether this would work in practice is a different question, the design you have given is very clear and gives the exact information needed.
Having every pot as a widget and being able to scroll through them, as well as the smart widget perhaps selecting the one that has either most recently changed, or has the highest balance, would be amazing.