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.
What you said already accommodates everything that needs to be said, gambling management really needs to be paid attention to. Experiences like this very often happen to novice gamblers, I have several friends who like to place bets on soccer gambling, and it is almost certain that they do not have time to enjoy the profits when they win, because their habit is to use them again to bet and play slot gambling. In the end, the initial capital will always run out, they just enjoy the pseudo fun, and enjoy it by telling stories to other friends.
The cycle of gambling without management does seem wrong, if you are continuously addicted to gambling, and every time you want to place a bet you have to raise capital, then that is the gateway to ruin. Controlling emotions so as not to be greedy is the real key, even though it cannot always be controlled, it can at least help a little to reduce the high losses that can be caused. For gamblers, there will be reasons given when they lose, and when they act carelessly they only regret it for a moment.