It is really a very impressive question that push us to ask our self why do we play for fun while we are using real money ? This should be discussed deeply because it seems like we are throwing our money from the window of gambling while we need to use it in a better way.
It is being discussed here and a lot of people have said that they are just doing it for fun and it doesn't matter if they use money instead just normal fun. If you have tried to do something in partly the same in real life then it should be with friends because it's fun to play with friends. It doesn't matter if you use your money or what, as long as you know what you are doing with it.