Having money in the bank doesn't mean you should spend unwisely, but having some funds for a rainy day is a valuable thing and can greatly improve the likelihood of success.
Figure 6: the likelihood of completing a given task within the mean value of a normal distribution.
图6：完成在正态分布平均值下的现有任务的可能性。
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Back in 1999-2000, they were against investors making money in equities over the long term, because of the likelihood that valuations would revert to the mean.