A situation where the stake for the bet he won was $1k, the next statement you hear is how wish I knew I would have staked with $5k. The question is, the $5k is it an amount of money that you can be comfortable losing or it's just out of greed that you are not contented with the win amount the $1k gave you.
The fact that you won using $1k today doesn't give assurance that if you had used higher amount or that your next bet that you probably increased the wager in order to win a bigger amount will play. As gamblers let not focus all attention on the amount that we may by chance of luck win but on what we are to lose should we fail to win the bet, in that way we won't spend on gambling above what we can afford to lose.
Stay in check!
OP, I vividly understand you, but gamblers don't think this way, note the idea of a gambler is to win despite that most of them know that losing is inevitable in gambling, some gamblers see winning to be a constant thing in gambling but that's is high level of fallacy, gambling has principles and these principles must come to play, it is normal for a good gambler to have it in mind that gambling is not a certain event so that when you gamble, your expectation shouldn't be one sided, you should reason in different direction which is the aspect of failing to retain your stake or getting your stake back with profits attached.
In gambling can win a large amount of money that can change the life of any gambler, but the probability of this is negligible. Each of the gamblers hope that he will be lucky, that's why many gambling. No one knows who will be lucky next, but this lucky guy is sure to be found and this further fuels our interest in gambling. You can play gambling 10-20 years, but so to taste the taste of this sweet victory. The main thing that should understand every gambler - you can only play for money, losing which your financial situation will not change.