. . .give me some feed back here. what is the difference between the book and the coin?
Any seller can set any price they want. They can use a "bot" or "algorithm" to set the price if they like. A buyer doesn't have to pay the price if they don't want to. They can just look elsewhere for what they want to purchase.The difference between the book and bitcoin is that the price listed for the book is the "ask price". Anyone can "ask" any price they want for the bitcoin they own.
The "market price" quoted by the various bitcoin exchanges (such as MtGox) is the price at which bitcoins were actually exchanged. You'll notice that the article says that nobody actually bought the book for $23 million. Whatever the highest price was that someone actually bought the book would be the "market price" of the book.
