I believe this strategy of gambling is called the 'Martingale Theory", and the concept is that you basically double your bet everytime you lose so that you eventually win back all the lost cash, plus a small profit.
This theory has had tons of holes poked in it before, unfortunately. Staking still requires a great deal of luck and so unless you have an absolutely MASSIVE cashpile (so that you eventually WILL win), this strategy may work for awhile but will eventually clean you. It
IS possible that this strategy can work for you though, but it has been proven time and time again that with a streak of extremely bad luck, it is possible to lose 8-9 matches in a row and essentially get cleaned.
This thread is very interesting to me as I just maxed out my character and am very interested to finally try box staking. I have personally tried the Martingale Theory method before with things like dicing and had successful runs with it, but I've heard far too many horror stories about people losing their entire bank from a run of bad luck, so I think this time I will be trying something different.
You should try another strategy, like taking a percentage of your bank that you are willing to gamble with, and put everything else in your bank so that you are not tempted. Use this to gamble with, and every time you win take a portion of those winnings to put into your bank and keep the rest to continue to gamble with. You don't make profit as fast doing this, but as a long term strategy this is alot smarter and will prevent you from losing your bank. You can still win quite big doing this method, you just won't be losing big