making a pure BTC/ETH/LTC ATM doesn´t make sense to me except you have High Volume Like in Huge Malls.

Small shops profit quiet well from BTC ATMs with different Coupons, cause they have more Visitors and get may
people in which would not visit a ShishaBar, ÖKO-Shop etc. otherwise, also after the user knows how to use it he is encouraged to Speak/Buy/SpentTime in the shop afterwards.  Tee or coffee bar would be not bad