I have heard the word professional gambling several times and they are seen as people whose main source of income comes through gambling. When you search further, you will see that this set of people are those who have once been won big. Profession gamblers could also be seen as individuals who have full control over their gambling activities. Apart from those who have won big or have enough money aside to take care of their need, anyone who depends on gambling for survival will die of hunger. I might be wrong, but I am speaking based on experience. Most of the unemployed gamblers that I know ended up becoming beggars until they decided to get jobs. Gambling is an unpredictable terrain, which makes income from there unstable. And with an inconsistent source of income, survival will become a problem.