For stuff that people need and will buy at heavily inflated prices, sure. But there are a lot of non-essential items that people probably won't buy if the price increases significantly. And for those items, I suspect a lot of stores will just let the shelves stay empty instead of spending a lot of money for inventory they can't sell.

The customer will only bear so much, though, so at some point the businesses that keep buying stock and raising prices will be left with stock that cannot be priced any higher, leaving it to be unloaded at a loss. That can be a far worse situation than not having any stock at all. Either way, it is an uncomfortable gamble.

Not enough greed: Stockpile in a back warehouse and raise prices on the two or three items per day you allow on the shelves.

Depends on the product and if your marketing is low prices do you want to be the one to first crank them up and get Trump all upset?