The prudent sit on the sidelines. Optimists recognise the froth, but hope to get out in time by selling to a greater fool before the bubble pops. Those greater fools insist it is different this time and high valuations are justified by great opportunities.
谨慎者置身事外。乐观者看出有泡沫，但指望能及时离场，在泡沫破灭之前让更大的傻瓜接棒。而更大的傻瓜坚持认为，这次不一样，高估值得到重大机遇的支撑。
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