Robocoin's bitcoin ATMs are hitting the United States later this month. Robocoin is installing these automated teller machines in Seattle, Wash., and Austin, Texas. The kiosks will enable a person to buy and sell the digital currency after scanning the user's government-issued identification, like a driver's license or a passport. People will be able to sell bitcoin for cash, buy more bitcoin, or transfer funds through a digital wallet. The new ATMs are not Robocoin's only machines.