The most common currencies include:

# Digital currencies

1. *Bitcoin (BTC)*: The first decentralized digital currency.

2. *Ethereum (ETH)*: A decentralized platform for smart contracts.

3. *Ripple (XRP)*: A decentralized payment network.

4. *Litecoin (LTC)*: An alternative to Bitcoin.

5. *Bitcoin Cash (BCH)*: A fork of Bitcoin.

# Fiat currencies

1. *United States Dollar (USD)*: The official currency of the United States.

2. *Euro (EUR)*: The official currency of the European Union.

3. *Japanese Yen (JPY)*: The official currency of Japan.

4. *British Pound (GBP)*: The official currency of the United Kingdom.

5. *Swiss Franc (CHF)*: The official currency of Switzerland.

# Other cryptocurrencies

1. *USDT (Tether USDt)*: A cryptocurrency pegged to the US dollar.

2. *USDC (USDC)*: A cryptocurrency pegged to the US dollar.

3. *BNB (BNB)*: A cryptocurrency for the Binance platform.

4. *SOL (Solana)*: A cryptocurrency for the Solana platform.

5. *DOGE (Dogecoin)*: A cryptocurrency that started as a meme.