I won't say that I'm shameful for being a gambler but what matters for most of the people here including me, is that we are shameful and afraid to be a loser. That's what is the most reliable and appropriate word to say in gambling. But when it comes for being a gambler, we shouldn't be ashamed on it because we know that luck is letting us win.
Yes and there is nothing wrong in gambling and I don't see any reason to be ashamed of it as after all we are not disclosing to people around us that we are into gambling as we can easily do it with bitcoins and no one around you would come to know about that.