There is no safe method. That said you can try betting a small amount but you will lose in the end. Its the casino owners who make a profit and the players are the losers.
If gambling was a safe method to earn money then people would not study hard and get jobs to earn money.
Yes, Gambling should not be considered as a source of income cause It doesn't guarantee that you will earn from it. Just gamble for fun and only use your extra money
yes playing gambling from extra money or even from pocket money is ok, but playing gambling for fun only is something not understandable, i think we cannot enjoy gambling without money involvement, there is only fun in gambling when you have invested money and are winning games, but if you are playing gambling without money involvement then you cannot enjoy gambling.