22 August 2008
the terms used you are, "very high" is a relative one. the decision of investment depends on the psychology of investor & market condition. In a Bull market, when share price doubles some investors think, it will rise again, then bullish investors will definitly buy it. But a Bear thinks, the share/market is over priced, he will wait to come down the share prices.
(just start trading then you will experience the market!)