But what about if you lose it will just make things worst you will be in a bigger debt so I think I would never do it.
That's ridiculous why you need to use others money if you already had something on your own? It's not a good idea if you are going to think that way and just simply win back or even grow that money from others. It's a crazy thing if you will do this because it's either you'll lose someones trust and even forget you because of this immature move.
This is a very high risk, unless there is a group of people who trust us for their money managed in gambling, so the risks are understood together, I will not do this, I am always confident with my own money rather than be a broker in gambling.
But however your argument, it is indeed the case for a certain group of people, many of them are not peracaya themselves and are only interested to deposit money to others to be played in the gambling.