Your financial status is more essential than your potential win in deciding if you should cash out or not.
Just like the man lost out on everything, so many other gamblers have also lost in regret. I have witnessed someone losing out on $1,000 because his potential is $5,100.
However in my area, some gamblers who vowed not to use cash out because of the potential that they finally lost at the end of the day when the bet they cashed out on eventually became successful are beginning to have a change of mind to use it as they have lost many cash out on a game that they later lost because they were focusing on their potential. Potential is just an audio money, it does not get to you until all games have turned out into your favour and many times you will lose. So why don't gamblers take what has been giving to them and move on to another bet but greed is one factor that doesn't allow gamblers to turn down on the potential winning. And some want to prove that they know how to analyze and predict games which should not matter to allow your cash out disappear for ever.