I have not read stories of Bitcoin ATMs being hijacked. How exactly will they benefit from doing that since the machine is not like a cash ATM where things are stored inside unless they will somehow tamper with the program in order to steal from the machine without making an actual payment, or is their target the cash buyers who use it to buy bitcoin?
well if the bitcoin atm allows withdrawal of fiat from the machine then surely there would be money stored in it
i heard that some atms will flash a qr code where you can send your bitcoins to and efficiently convert it into fiat in which will be withdrew immediately through the machine you do not need to log your wallet in the machine to sell the bitcoin so it is quite safe but again scammers and hackers are very smart so we can never be too confident about security