There aren't shortages until there are. All seems normal until the tipping point. Don't go out and buy up 2 months of supplies in one swoop, unless you want to

There aren't shortages until there are. All seems normal until the tipping point. Don't go out and buy up 2 months of supplies in one swoop, unless you want to raise eyebrows and lead to the perception of shelves emptying and then causing it to come true. Buy a weeks worth of extra supplies every other day for a week or two.