I can't imagine myself "playing for fun". In my opinion, the pleasures in the game are very clearly associated with winning. And if there are no wins, for me, continuing to play becomes a problem. And even a series of losses makes or would make me think about continuing to play. I can only repeat that I do not get pleasure from losses. But if you play just for fun, then losses are just part of your game. Most likely, even a long series of losses will not be considered a "streak of bad luck". The same thing happens when you play for research purposes. Since your losses are small and controllable in amount, there is no point in doing anything special after a long series of "failures".
Taking a break when you're on losing streak is sincerely the best thing to ever think of and do actually. This break will ease up your mind and make you remorseful for your actions been executed in the space. I've made both gigantic wins and huge losses in the space but who to tell because it's always been a long story. I've taken my time to examine the soft spot that's my weakness in the space and working entirely on it, atleast to temporarily eradicate some sort of loss. Losing streaks is definitely not the situation I would want anybody to be in not even my enemies because this space of losses comes faster than anyone could spot eyes on.