Several main areas in which cryptocurrencies can be applied:

1. Medium of exchange: Cryptocurrencies can be used for financial transactions, including international ones, without the need for intermediaries such as banks. This can be especially useful in countries with limited access to banking services.

2. Investments: Many people use cryptocurrencies as a form of investment, hoping to increase their value over time. This may include both short-term speculative operations and long-term investments.

3. Smart contracts and decentralized applications: Some cryptocurrencies, such as Ethereum, support smart contracts that allow you to create decentralized applications (DApps) for various purposes, including financial services, games, identification and more.