What is the most expensive pork to eat?

Could you please elaborate on what makes certain pork products the most expensive to consume? Are we talking about rare breeds, special feeding practices, or perhaps a unique aging or curing process? I'm curious about the factors that contribute to the high price tag associated with the most luxurious pork dishes. Are there any specific regions or countries known for producing such expensive pork, and how does the cost compare to other luxury meats? Additionally, are there any cultural or culinary traditions tied to these expensive pork products?