Before we can deploy ATM bitcoin, we need to talk about its popularity. We can not place ATM bitcoin in a country where bitcoin is not considered, which is a waste. At present, bitcoin is only common in some parts of the world, so little bitcoin ATM exists. The cost of transactions is essential, we do not need to bother about it.
I Agrre, withyou, we cannot make a bitcoin bank or build an atm that containing or converting bitcoin if the country we provided doesnt accept bitcoin in their country, what if the machine has no money , it is empty no more people or bank members will refill the money on it, and therefore we will back on our onlike banking and our online wallet, building an atm machine on a country doesnt support it is not recommended.
Well, in my country, Croatia, we already have 2 bitcoin ATM but bitcoin is still not officially accepted (and still no so much users).
Still, one company managed to start official business with buying and selling bitcoin.
How?
It looks, they find some ''hole'' in the current law, and even they managed to avoid paying taxes on transactions, based on the article in the law that tax is not paid on banknotes or money which is not officially in use
So, even without full legal acceptance, it's possible to have bitcoin aTM and even buy or sell bitcoins.