Online gambling provides comfort, accessibility, and anonymity, which can entice a gambler into gambling unnecessarily, resulting in addiction. A gambler can easily fund his betting account, and as a result, such a gambler is likely to spend a significant amount of time gambling, gradually developing an addiction that is difficult to overcome because we are what we do constantly.
It's true that online casino gives gamblers the advantage of comfort and easy accessibility but speaking of anonymity, there are no many online casino that has that anonymity features. Many of the online casinos you see out there are fully regulated.