-snip-
I think what we are discussing here is what you you would buy in case you win something from the casinos. I don't think we are discussing about storing bitcoins or buying bitcoins to deposit it in the casinos. It's nice to read about what other people use their winnings on, it gives us an idea on what to spend it on.
You should do it. You should buy things everything you need! You should leave them alone then tell them you are quitting. It is not elaborated, what can you buy with your money won in gambling.
There are gamblers that are choosing not to buy or spend their winnings because they think that it will be profitable for them if they won't use it. And if you win some good amount, there's no need to be forced on buying whatever you want because it's up to you. It's your money and you are the one to decide what you want.
I am not totally a gambler but I know how to gamble. Of course! I won and I lost sometimes. When I won in gambling, I save my money to buy foods and my personal things. I don't want to be addicted to gambling. I know how hard to your family to understand why you do it.