What does "playing with the casino's money" mean?

What does "playing with the casino's money" mean?

Frank Scoblete (Casino Gambling Expert & Bestselling Author) gives expert video advice on: Which casino games represent the best odds for a player?; What is the rule of thumb regarding "when to walk away"? and more...

When you're in a casino you may hear someone say, "I'm playing with the casino's money now." When they say this, a person means that they have won some money and they are going to be less conservative with regard to how they gamble. In fact, once you've won that money, it's your money, and I would take as much care with it as I did with the money I entered the casino with.