Bitcoin's volatility has plunged, but extreme price swings are more frequent than in 2018
While Bitcoin's overall volatility has decreased compared to 2018, the frequency of extreme '3-sigma' price swings has actually increased in 2026. Analysts suggest that while the market has matured, it remains susceptible to sudden, sharp repricings due to macro factors and leverage.
Why it matters
Understanding these volatility patterns is crucial for institutional investors and traders assessing the risk profile of cryptocurrency as an asset class.
The largest cryptocurrency has recorded 10 days in 2026 when its price moved at least three standard deviations from its recent trading pattern, according to a CoinDesk analysis. That's more than the eight such days recorded during all of 2018, when bitcoin lost 73% of its value.
Traders measure these unusually large moves in ‘sigma,’ a measure of how far an asset's price typically deviates from its normal behavior. To quantify them, CoinDesk compared each day's price move with bitcoin's 30-day realized volatility, a measure of how much its price typically moved each day over the previous month. Any day that moved at least three times that amount, up or down, counted as a ‘3-sigma’ day.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in