At first the mindset your friend is having towards gambling is wrong , he's thinking that gambling is place where he can get rich quick which Is a bad mindset and he continue gambling won't assure him a big win actually, but he can endup being a gambling addict if he continues In such manner. He should have some principles towards gambling and reduce the urge of gambling frequently. Because he doing so not only increasing the chancing of him hitting the jackpot but the chances of him losing all his or alot of his cash in gambling.
Newbies who start gambling become totally addicted to gambling because of their get rich quick addiction. I have some close people who are completely addicted to gambling and lose all their money. Once he begins, his destruction is inevitable and he himself will not know when his destruction will begin. Gambling is good for entertainment but some people want to get rich quick and lose everything and end up destitute.