In fact, I have little experience with bitcoin ATM which I easily convert my bitcoin in fiat. But, I prefer to use my online wallet which I can also convert bitcoin into fiat. This kind of machine will help all people who have bitcoin so if they need to have fiat they can use this machine.
It's helpful if you are travelling in different countries, but since I don't love to travel, ATM is not really that important to me as I can directly
transfer my money from my local exchange to my bank account. With the increasing no. of ATM, this would help to attract the curiosity of the people, eventually they'll learn about crypto currency.