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The WSJ article is behind a paywall, but this is good read https://theconversation.com/the-rise-and-fall-of-theranos-so-many-lessons-in-a-drop-of-blood-57787

So much of investment activity is speculative that people have lost touch with the fundamentals. If you find something better, and people are prepared to pay more than your additional cost then it is a winner. Risk can be difficult to quantify but everything else should be. There are a lot of companies out there who seem to be able to raise huge amounts of money without a great product. Presumably when the tide goes out we will see who is swimming naked, to quote Warren Buffett.

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