Is it possible to spend daily expenditure by gambling money? I think this is not possible. If you play gambling, the loss is more than profit. But yes, many people can play gambling very well and they can earn a lot of profit. But I would say gambling is never a profession. So it is better not to earn money by playing gambling. Gambling should play just for fun. You should not spend your pocket money with gambling money.
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In my opinion, if you really understand what gambling mean and you are a master at fundamental management, so you can spend a expense on gambling in shorterm. Why shorterm? Because you can earn a lot in shorterm if you are luck, but for a long run, house edge will take everything from you.