Can Faker generate rates for cryptocurrencies as well

- `cryptocurrency()` - returns a tuple containing a cryptocurrency code and name, for example `('BTC', 'Bitcoin')`[1]

- `cryptocurrency_code()` - returns a random cryptocurrency code like `'ETH'`, `'LTC'`, `'XRP'`[1]

- `cryptocurrency_name()` - returns a random cryptocurrency name like `'Ethereum'`, `'Litecoin'`, `'Ripple'`[1]

So while Faker does not generate realistic exchange rates, it can provide random cryptocurrency codes and names for testing purposes. This allows you to simulate scenarios involving cryptocurrencies in addition to traditional fiat currencies.

Some examples of using these methods:

python
from faker import Faker
fake = Faker()

# Generate a random cryptocurrency tuple
fake.cryptocurrency()  # Output: ('BTC', 'Bitcoin')

# Generate a random cryptocurrency code 
fake.cryptocurrency_code()  # Output: 'ETH'

# Generate a random cryptocurrency name
fake.cryptocurrency_name()  # Output: 'Litecoin'

So in summary, while Faker's cryptocurrency data is randomly generated and not based on real-world data, it can still be useful for testing applications that need to handle both fiat and cryptocurrency data. The generated codes and names can help ensure your application is prepared to deal with various types of financial instruments.