Bitcoin ATM is a lucrative investment if you can have the upfront huge cost to start operating it. Having one at a countries airport or shopping mall will attract a lot of users while you charge transaction fees on it usage.
But there is also something you need to be taken into account and that is the maintenance fees, not to mention that there's a possibility for the ATM to be vandalized by the criminals. Although as I've seen most of Bitcoin ATM charging quite the amount of fee but I just can't see that the Return of Investment will be near.
It seems to me that the current capabilities of cryptocurrency users are very scanty and therefore everyone who is in the cryptocurrency market is trying to earn more from this business. That is why there are still high interest rates for using Bitcoin ATMs. When surreal infrastructure is ready for the use of cryptocurrency, I hope the conditions are much more favorable. if the banking system had personal funds, then they would definitely use the cryptocurrency market for la for profit. But since all the funds in each bank are personal funds to the client, they cannot risk them, since the cryptocurrency market still has a lot of big risks.