I am beginning to think that the only time a gambler gambles for fun is only when he gambles with what he can afford to lose. In this case, a gambler has $10,000 as his savings, and he gambles with $1000 down, he or she won't feel sad when they lose it (it means they gambled for fun). But if a gambler who has the same $10,000 gambles for above $5,000, and he loses all of them, the gambler won't be happy about his actions, and it might result in chasing of losses (which means he didn't gamble for fun). It means that both those that say they aren't gambling for fun sometimes gamble for fun, mostly when they risk an amount they can afford to lose. The actual time you gamble for fun is when you risk what you can afford to lose and not when you say you want to gamble for fun. However, a gambler might say he will gamble for fun and still end up not gambling for fun when he starts gambling. One can know a responsible gambler if he starts gambling.
I'm not wealthy nor a person who has $10,000 as his savings be termed wealthy enough to gamble with $1000 talk more on gambling with half percentage amount of his savings, I see no level of responsibleness in such action. A reasonable gambler out of $10,000 of his savings would at ease be prone to risk out just $100 dollars to gamble whereas if the amount gets far beyond this then his instincts is no longer gambling for fun but rather wanting to make good fortunes by staking with huge power, also considering that 10% or 50% of that amount is valuable enough to invest other than risking it all in gambling.