Heard of bitcoin's 'halving'? shake crypto markets in 2020

If you're not a bitcoin enthusiast, you probably haven't heard what's happening next year: It's called the "halving", and it will cut production of the cryptocurrency by 50%.

Players in the know are preparing for the sharp price gains and volatility that have accompanied previous halvings, which happen roughly every four years and act to both ensure the scarcity of bitcoin and keep a cap on price inflation.