Bubbles are about prices, not ideas. Prices affect things in at least two ways: 1) The idea may be something people are willing to pay for, but when given an i

Bubbles are about prices, not ideas. Prices affect things in at least two ways: 1) The idea may be something people are willing to pay for, but when given an inordinate amount of money with which to execute it, people go overboard on spending and create a business that is unsustainable if the money unexpectedly goes away (even if the idea itself would have been sustainable if they had started off with less but more predictable resourcing). 2) The idea may be a thing that people want, but costs more to execute than customers are willing to pay (and thus can only be financed in an irrational bubble). In both cases the ideas are for things people want. You can't judge a business by the idea alone.