How come he lost everything one day? Do most of the gamblers lose money in such way?
When it comes to playing, there are times that you will win, but we all know that after all those winning, you will suddenly lose because luck is not on your side everytime.
In this case, your friend might have face his losing streak and tried to take his losses back, unfortunately, your friend wasn't able to do that and end up losing all his money.
Gamblers who have huge bankroll most of the time thinks that they can comes out with decent profits, trying to keep playing while funds still doing great and some lucks gives them hint, but in the longer run those lucks start to fade and losing streaks begins to show up and with aggressive approach this gamblers will only realize that everything was gone and busted.