Some people gamble for fun which is the right reason someone should gamble. If you want money from gambling, let it be small in a way that you will still not use more than small amount of money to gamble. Do not gamble because you want to make money and be using high amount of money to gamble because gamblers are always losing than winning. The losses are so much more.
If you want money from gambling, you actually need to play to win big because winning small won't change any situation since it's a game of luck, it's good to be lucky winning big someday than be lucky winning small, so why don't you aim for winning big no matter the amount of money you used, it's up to the gambler though on this one.