No pain no gain !
Even if you gamble with care, you still able to loss or just make small profit.
I'm suggest if you want to gamble just make sure that you're prepare for lossing rather than winning !
There is no way for betting safe in a gamble,if you wins you can make more money or it will be your fatal bro.
But there are some ways available for not losing your all investment.Make sure you have time and money limit on gambling to reduce yiur losses in gambling.
I think there is a one way that is, pick only the low odds to bet then your winning chances will be high.
I think there is no safety is gambling just care needed. You should be careful while gambling because of the old gamblers who use different tricks to win the game. You should avoid gamble with the old players. I will also suggest you to bet as much as you can afford.
If you bet a lot of money in one bet and you lose then you will be more upset, so it is better to gamble in your reachable money. by this way you will be able to bet again and again and can try your luck several times with less money.
Many people think like me that gambling is not good and if anybody wants to gamble then he should play as much as he can afford, because new gamblers seldom wins the bet. Mostly he loses because of the tricks and techniques used by expert gamblers.
The safety is only this not to gamble beyond your limitations and should be in a limit. As the time passes you will learn gambling techniques and you will become an expert of gambling.