I don't believe any serious gambler who knows what it takes to win against the house will ever treaty monies won as worthless or even close to that.
It's why I've said that not all gamblers are thinking that way. Those who are living through gambling will not treat those winnings as worthless money. It's the money that they need for their living so treating it that way is just pushing them down as a gambler for fun.It's rather those who never expected to win and won out of luck who don't really care about their profits and often blow it all over again on subsequent gambles.
Like me! 
when I win unexpectedly and I'm expecting that my day will end losing my money that makes me think that money is good to spend or bet for another tries.