Investment has been a serious issue for those who want to have a better quality of life or who expect to be retired earlier. Fortune, to some extent, is the key to own freedom in this society. However, how to reach the door of freedom by a relatively safer way to invest? Based on this idea, this thesis aims at the long-term investment with the target of gold, U.S. REITs, U.S. Bond ETF, Taiwan Stock ETF, and U.S. Stock ETF. To support the statement provided in this thesis, this thesis has collected historical data for 27-30 years from Bloomberg Professional and used the data to calculate the annualized rate of return and standard deviation of each long-term investment of ten-year from different periods (e.g., from 1992 to 2001). By analyzing the result of each of the investing tools above, this thesis discovered that the annualized rates of return and standard deviations of gold, U.S. REITs, Taiwan Stock ETF, and U.S. Stock ETF are not stable while those of the U.S. Bond ETF are steady. When putting all the investing tools together into one portfolio, this thesis unearthed that the annualized rate of return and standard deviation all turn out to be stable even in a financial crisis. Thus, this thesis concluded that when doing a long-term investment, it is vital to have a well-selected portfolio. In this way, it is possible to beat the market.