Legal U.S. dispensaries are expected to ring up between $8 billion and $10 billion in medical and recreational sales this year. That’s an increase of as much as 66 percent compared with 2017. Sales are expected to more than double to $22 billion by 2022 as more states legalize marijuana, according to Marijuana Business Daily. Nevada sales have beaten state expectations and are also expected to roughly double by 2022 to $1 billion, according a report by Canaccord Genuity.