One problem with the word bubble is that it creates a mental picture of an expanding soap bubble, which is destined to pop suddenly and irrevocably. But speculative bubbles are not so easily ended; indeed, they may deflate somewhat, as the story changes, and then reflate.
泡沫一词的一个问题是它创造了一幅扩张的肥皂泡心理情景，这个肥皂泡注定会突然地、不可逆转地破灭。但投机泡沫并没有那么容易结束；事实上，它们可能先因为故事的改变而收缩一定幅度，然后再度膨胀。