Generate random price in BTC.

        :param minimum: Minimum value of price.
        :param maximum: Maximum value of price.
        :return: Price in BTC.

def price_in_btc(self, minimum: float = 0, maximum: float = 2) -> str:
        """Generate random price in BTC.

        :param minimum: Minimum value of price.
        :param maximum: Maximum value of price.
        :return: Price in BTC.
        """
        return '{} BTC'.format(
            self.random.uniform(
                minimum,
                maximum,
                precision=7,
            ),
        )