What does volatility mean?

A measure of fluctuations in the price of a financial instrument over time. A low volatility asset typically sees small changes in price and a small total range of prices, while high volatility assets have a very large potential range of prices, and the possibility of rapid and significant price changes in short periods of time. High volatility in Bitcoin is seen as risky since its shifting value discourages people from spending or accepting it. In traditional markets high volatility is also associated with high risk investments.