Not really. A bubble can be a self-organising Ponzi scheme - earnings from Yahoo came from advertising which was paid for by capital going into the tech bubble;

Not really. A bubble can be a self-organising Ponzi scheme - earnings from Yahoo came from advertising which was paid for by capital going into the tech bubble; and the pre-GFC US economy was arguably one giant bubble (with earnings being paid by people who were willing to do overtime to keep their million dollar houses out to the hock), but it's not quite the same thing. They do have the same (or similar) dynamics though.