So gambling is not a good habit at all.
Even you gamble with a certain amount every month, you can still be on the wrong decision. Because you have been allocating a budget to gamble, that's making it wrong. What if the time of needs come? When you have something important to buy or use that money for, for your relatives? But you did allocate a budget of it instead of that important matter. And that what makes gambling wrong.
That is why you have to allocate something for the gambling right? As long as you are balanced enough to not waste that money you have separated for own use or personal. And that is just the common dilemma for gamblers even if u said you would set it aside if you lose there is always the rage to gain or to take back what was lost to you in gambling. Generally it is wrong but it is definitely a fault in your own self righteousness.
Yes you are allocating something for your gambling needs and the wrong decision starts there. It's better if you are not going to allocate a certain amount there. I'm saying that only use spare money or bitcoin when you gamble. But you are right, the wrong way of gambling is when you keep on thinking about the gain.