There are no security guards watching the machine specifically but this is in the Emirates Palace Hotel. Frankly what you would spend to even get in there would outweigh what you would stand to gain from cracking the machine even if you could pull it off (which a sole individual could not, it'd take some kind of orchestrated Die Hard movie ploy to suceed, and then it would be even further from lucrative versus the cost).

edit: I misread, this is a seperate machine from the Emirates Palace one. But this one is in an excessively crowded area in a high class mall with abundant security so I feel the point still stands.