That's very funny for a person building Bitcoin ATM to withdraw Bitcoin or any other cryptocurrency, which is not possible, because Bitcoin is simply means a digital currency, which can not touched, but only see the virtual figure of the assets you have in wallet and all Bitcoin transaction are being done online. Accept when government officially accept as a means of transaction in a country, it can be able to link with Bank, by issues ATM to withdraw as Fiat money, base on the current price in market to the local currency exchange rate, it we come to past as long Bitcoin is exist on the planet
This is the difference if you do have the knowledge or not and since these robbers do really have that kind of knowledge about ATM's on having fiat then they would really be coming after on whats inside.
The thing on here is that they do destroyed out an BTC ATM machine which you wouldnt really be seeing any cash inside or if ever there's one then it wont really be that soo much big.
Everything would really be that in digital form in terms of those amounts and if you dont have the idea on what it is, then you would really be having impressions that the said ATM is empty
and having no cash but eventually that is really having that funds inside but its on digital form.I dont know if these ATM's does have that kind of private key generation for each
address, but if it does have then it could potentially be that known on those possible exploits of those wallets that had been that generated.