as long as enough investors think it's worth 100 billion. . . . . . for now, and continue to increase their estimation of the company's worth in the future. T

as long as enough investors think it's worth 100 billion. . . . . . for now, and continue to increase their estimation of the company's worth in the future. That's a key caveat. The easiest way to get hurt by an overvaluation is to conflate what people are valuing something at right now with what it's actually worth. Overvaluations and undervaluations both tend to regress back toward a fair valuation over the long haul. Even poor valuations that most everyone agrees with for the moment. People's opinions can and will change.