I think it's a false dichotomy to compare the tech bubble with facebook. The former was an economic phenomenon that was dependent on the continued supply of new

I think it's a false dichotomy to compare the tech bubble with facebook. The former was an economic phenomenon that was dependent on the continued supply of new money from increasingly clueless investors (essentially a pyramid scheme, like all bubbles). The latter is a business with a ton of users and a disturbing amount of information on those users. They have several options for further monetization that don't necessitate unsustainable growth. I do hope facebook fails because of its stance on privacy, among other issues. But I don't think its situation is at all comparable to that of the tech bubble.