To build a diversified cryptocurrency portfolio, consider these steps: 1) Research various cryptocurrencies and their technologies. 2) Allocate investments across different asset types, including major coins like Bitcoin and Ethereum, as well as emerging altcoins. 3) Diversify across sectors such as DeFi, NFTs, and gaming. 4) Assess risk tolerance and invest accordingly. 5) Regularly review and rebalance the portfolio. 6) Stay informed about market trends and news. Diversification can help manage risk but doesn’t guarantee profits.