I can do that, unless I open my BTC wallet while gambling... that makes me tempted to deposit some money there. A lot of money actually, it makes me really greedy as soon as I deposit some. So I prefer playing with free money.. that makes me controllable and even if I go all in after I win big, it's like i never had that money. It's not like I deposited it and now I lost all and I'm homeless.. 
very honestly it is really very difficult to control yourself in trading if you have no strategy and if you are playing gambling without any planning. i personally cannot control my self while playing gambling therefore i have limited my gambling up to certain level and i usually bring such amount that i have limited for gambling. Not only you but most of the people can't control them while gambling. Whether they are winning or losing both times difficult so it is always good to go with some fixed amount to gamble. Because no need to worry much about the controlling and we can fully enjoy our games and time.