Winning is alway the mindset of a gambler. They are always optimist that even they have 1% of winning they will still take that chance to win.
Though sometimes they tend to be greedy, they wont stop even they already loose huge amount of money, likewise even they already won they still wont stop.
Of course every serious gambler has the mindset of winning and making returns on his investment but the difference has to do with your approach towards the game but the mindset is common. It is only greedy and unprepared gamblers who lack self control that wont stop at nothing but the cunning gamblers choose their moments and make correct decisions when it matters most because they have self control.