How do you know if a cryptocurrency is volatile?

In the vast and rapidly evolving world of cryptocurrencies, how does one accurately gauge the volatility of a particular digital asset? The term 'volatility' is often used to describe the frequency and magnitude of price fluctuations, but what specific metrics or tools do professionals rely on to make this assessment? Are there any key indicators or patterns that tend to precede significant price movements? Furthermore, how do market conditions, such as liquidity and sentiment, influence a coin's volatility? Ultimately, what strategies can investors employ to mitigate the risks posed by volatile cryptocurrencies?