Rothschild: How He Used To Invest

"It may have been Meyer Rothschild, the German banker and patriarch of the legendary House of Rothschild who, when asked how he got so rich, attributed his success to two things. He said he always bought when there was blood in the streets - panic, chaos - when despondency gripped the markets. (in old man Rothschild case, investing amid the turbulence of the Napoleonic wars, the blood was as likely to be literal as it was to be figurative.) And he always sold "too soon". He did not wait for the enthusiasm to peak. He always knew when to get out, and he got out in time with all his money." Jim Rogers