The amount that we can lose and make sure that it is the only small amount. I dont think it is good to spend alot even if we can afford it. Alot of people have lose alot from gambling so I dont think that it is good to waste money. The money that we dont waste could be use somewhere else when we need it for sure
Gambling is not made to earn money instead just to enjoy your free time with a small amount and if anyone understands this logic then they will never spend more money in gambling. But some people wants to earn quick money without doing a hard work so they end up losing more money in gambling. As you said, one should always go to gambling with small amount and never deposit bigger amount and lose finally.
It is made to earn money but not for everyone if we look back in the history when gambling was played only with cards and stuff it was designed that one of the persons will win it and not the all. Since, that day and today everyone playing the gambling wants to earn money with it.