What is your motivation for doing so? Is it because you assume essentials will be unavailable because of other people stocking up, or because of eventual pandemic related supply chain issues?
Maybe I'm naive, but I just can't imagine that because of the pandemic society will be collapsing to a point that it becomes hard to obtain the food I need for me and my family.
2. To avoid buying food from the grocery store that may have been coughed/sneezed on and still have live virus on it. Stock up on non-perishables while they’re still more likely to be clean.
3. Anticipate shortages due to other people stocking up.
4. This virus came from an animal and can also infect animals. So maybe the outbreak infects animal feedstock and reduces our food supply. Or the outbreak infects Ag workers and reduces our food supply. Or the outbreak disrupts supply chain between farms and table. That kind of thing.
I don't anticipate the need to isolate but I figured I'd play it safe. I thought this was what others were doing, but now that I think of it I'm just assuming people think as I do. I personally didn't buy 40 rolls of toilet paper.
Additionally, if the virus is rampant in your area, you may not wish to go to grocery stores and risk exposing yourself.
There are already enough "it's just a flu" people out here I don't really want to wade into that any more than I have to.