You can get addicted to basically anything. Once you get it's always a problem. And. The problem with being addicted on gambling is that you can lose track oh your spendings and you can happen to spend more than you can afford to.
Some people actually only lose a small amount each time they gamble however the sad part is that they keep on doing it and keep on playing even when they know that they have lost. In the end, the accumulative amount should be very well high enough if you do some calculation on it