According to the latest report from CoinShares, the traditional 60/40 portfolio (60% stocks and 40% bonds) is no longer suitable for the current market environment. Research shows that the inclusion of Bitcoin in the portfolio can significantly enhance risk-adjusted returns. Allocating 4% of Bitcoin to a 60/40 portfolio increases the Sharpe ratio (a measure of investment return relative to its risk) from 0.48 to 1.05 and decreases the correlation of the portfolio. In addition, Bitcoin has also shown significant diversification and return-enhancing effects in classic portfolios such as the All Weather Portfolio and the Yale Endowment. The analysis suggests that the optimal Bitcoin allocation ratio is between 4 and 10 percent, which can significantly improve portfolio performance while maintaining reasonable risk.