[paulgb]

The difference is, a bank only has a certain amount of money, while a grocery store can turn over inventory on a daily or weekly basis. So if I stock up now before everyone else does, I can actually make less of an impact if and when there is an eventual need for everyone to prepare to stay home for a week.

[brokensegue]

Functionally the grocer has a limited supply also because there is only so much production/shipment capacity. I agree if you do it early enough your impact is minimal.

But if you withdraw early enough from a bank then the bank can in theory safely exit from its positions and become more liquid