I have heard the advice that you should only use money you can afford to lose for gambling. I say that this is more theoretical than practical. Literally no one has money that they can afford to lose. I feel that money for gambling is a matter of opportunity cost. You either use the money for gambling or use it to meet a need. If using money one can afford to lose were practical there will be no need for articles on having a gambling budget or bank roll management. Hey gamblers my question is to you now is, the money you currently plan to use for gambling is it money that you can afford to lose?
When people say
"use the money you can afford to lose for gambling", it simply implies they are saying you should be use an amount you could afford to risk (i.e even if you happen the lose it all you won't feel it that much), of which everybody had a particular amount of money they can afford to risk at all times.
Example:
Let's assume a forum member "Y" has a monthly salary of $10,000, while a forum member "X" has a monthly salary $1000, and both are invited to gamble at a casino, and "Mr.Y" happens to stake $1000 on a single game (i.e 10% of his monthly salary), you literally don't expect "Mr.X" to stake same $1000 on a game (i.e 100% of his monthly salary) because by doing so he will be putting his entire money at risk, so on that note, what Mr.X will be able to stake is $100, which is 10% of his monthly salary, and an amount he could to risk.
But note that what people could afford to risk varies from one individual to the other.