I was thinking it's very similar to the housing market. Where previously houses would be set sale, estate agents decided to auction them since demand was outstripping supply. Everybody could've played it cool and decided to just keep paying the "set sale" price, but instead decided they were happy to pay 10% over the asking price and so it kept on fuelling itself. The only reason house prices have doubled is because people with spare savings decided that's what they wanted to spend their money on. Of course, the people who bought property 20 or 30 years ago can still buy and sell - in essence, they're only spending what they paid back then. So... basically the same as records?