How do botcoin ATMs work?
That would not be possible with Bitcoin. Because the founder and operator of bitcoin was anonymous and no one could know what he was doing. Therefore Bitcoin ATMs will not be available. But I believe in the revolution of Crypto, there will be altcoins doing this to beat the bank of the world.
I hope Hashcard and Credits can do this.
Bitcoin ATMs are already available in some countries. You can get cash fro bitcoins or deposit cash and get bitcoins through these easily.