That is either an unreasonable or a flawed analogy, depending on exactly what you meant. It is almost never reasonable to use essentials like food when the discussion is about luxuries.

If by bread you meant specifically and only bread, then there is no issue. People will simply do without bread, perhaps buy pasta, you will be out a huge amount of money, things go about how you'd expect. In that case your analogy is flawed because you have not changed the market price. Instead you have lost yourself a lot of money.

If by bread you meant "the food supply in general" then it is an unreasonable analogy. The food supply likely requires legal protections that luxuries don't because lives are at stake. You are able to manipulate it only because people are physically unable to "do without".