A good counterpoint to the title quote would also be "Never expect a good thing to last forever". At some point growing investments gain a momentum all their o

A good counterpoint to the title quote would also be "Never expect a good thing to last forever". At some point growing investments gain a momentum all their own. I.E. everyone invests in China because of their double digit growth; and China has double digit growth because everyone invests in them. The problem with a compounding growth curve is that it gets so steep that it shoots past the place where it should have found equilibrium.