There are several properties of digital currencies that you can consider when investing:

1. Market Cap : Market capitalization reflects the total value of a cryptocurrency and can give you an idea of its size and potential for growth.

2. Technology and Use Case : Evaluate the underlying technology and the practical applications of the digital currency. Consider whether it offers unique features or solves real-world problems.

3. Development Team : Assess the credibility and experience of the development team behind the digital currency. A strong team can contribute to the success and long-term viability of the project.

4. Community Support : Look for digital currencies with active and engaged communities. Community support can drive adoption and contribute to the overall success of the project.

5. Adoption and Partnerships : Check for partnerships with established companies or institutions, as well as adoption by merchants and users. Increased adoption can lead to increased demand and value for the digital currency.

6. Security : Consider the security features of the digital currency, including its consensus mechanism and resistance to hacking or attacks.

7. Regulatory Environment : Be aware of the regulatory environment surrounding the digital currency. Regulations can impact its legality, use, and potential for growth.

8. Scarcity : Some digital currencies, like Bitcoin, have a limited supply, which can contribute to their value over time.

9. Liquidity : Liquidity refers to how easily a digital currency can be bought or sold on exchanges. Higher liquidity typically means lower trading costs and less price volatility.

10. Risk vs. Reward : Assess the risk-reward profile of the digital currency. Higher potential returns often come with higher risks, so it's important to balance potential gains with potential losses.

By considering these properties, you can make more informed investment decisions in the digital currency space. Additionally, diversifying your portfolio across different digital currencies can help spread risk and maximize potential returns.