I have lost a lot and I didn't want to gamble anymore after that. I think it's around 0.5 bitcoin, and I don't think it's healthy anymore, it's just not playing with money, it's choosing priorities over other better priorities.
As far as the advise for limiting amounts of money when you gamble, as a gambler you should able to sustain that for any period of time. If you don't want to gamble anymore, get busy with life do some activities that lead you in a healthy lifestyle. It's not easy when the urge strikes but you really need to control yourself when that time comes.