I do multi-bets and single-bets, every time I win, sometimes I forget myself and use all my $$ on the next bet. This sometimes gives me big wins, but if I'm unlucky I can lose all my funds and this has happened many times.
This means that you are greedy. Do not mind me that I said that. I was like this before. I can win 10x and still continue to bet with the total money that I have and my winning together on a single bet. I even remember a time that I bet like $1 up to when I won $35 and I lost all at ones. It is called greediness and it happens to addicted gamblers. You will need to stop that because you are chasing money and not fun.
This total $$ betting manners comes from when you have excess balance on your casino account, because at a level where you have just a small amount of deposited amount in your account, you won't be tempted to bet with all your total funds, and at some level you will know when to take out money from a casino when you already accumulated a tempting balance amount from your game seasons and rewards.