Fri 250725 Invested £5.00 into Ladbrokes/and, lost the lot...?!

When I tried signing into my Ladbrokes a/c.; 
I saw that there as a £2.xx balance.

I decided I wish to withdraw this sum, immediately, right away.
Only trouble there is...the minimum amount you can withdraw is £5.00.

So, this meant I had to deposit into my Ladbrokes a/c £5.00;
in order to be able to withdraw the £2.xx funds won;
bearing in mind, that the minimum deposit is £5.00.

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Only when I went and deposited in the £5.00; 
-(thus, leaving me with a £7.xx balance)-;
my mind said why not go and do some Roulette gambling, first;
before withdrawing any money.

So, I went ahead...; and, initially, made small bets...10p/20p;
and, if it lost I then 'doubled up'...until when it won;
a gambling strategy which paid off for a while.

Only, one can not rely too much on the strategy of, always, 'doubling up'...;
as, sometimes, your money runs out completely due to repeated 'losing'.

In this case, I bet on 'red'...; and, I believe 'black' came up 
something like 11 times all in a row...; before 'red' finally appeared;
but, then, by that time I was already left totally 'flat broke'...;
with no more money available to 'double up'/
or, gamble on 'red' winning anymore.

I left the Roulette table feeling extremely disappointed;
especially, when I was up £11.xx;
just before the 'losing streak' happened.    

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-(Oh yes, before 'black' came up 11 times in a row...;
one of the numbers that came up as being a part of that same sequence...
was the losing number 0.)-