During times of low inflation these investments are not likely to outperform safer investments such as CDs. The loss of purchasing power due to inflation is much harder to measure than a drop in the price of a stock. Widely traded stocks and mutual funds are easy to sell. Limited partnerships and art collections are more difficult. Studies have shown that men tend to take higher risks when investing and want short-term results.
Women tend to approach investing for the long-term and are more patient.
And that's what counts for building retirement savings.