1. Supply: The total supply of each cryptocurrency can vary, with some having fixed supplies and others permitting more to be created over time.
2. Technology: Different cryptocurrencies are based on different blockchains and protocols, which dictate how the data is stored, transmitted and validated.
3. Use Cases: Different cryptocurrencies have different use cases, meaning that not all are used for the same purposes.
4. Governance Structures: Cryptocurrencies can have different types of governance structures, like open-source community-led models or company-controlled models.
5. Valuation: Different cryptocurrencies also have different valuation measures, depending on factors like utility, scarcity and market capitalization.