That's too risky and for sure that there is no guarantee that you will win, and it is a bit of luck if you ever won. The question is if you are really an experienced gambler and have tactics for winning the game. Also, what if you lose the money? What would be your excuse?
Eventually the person will lose the money, and the friend.
It's a no win situation, I wouldn't do that at all.
Everyone should gamble whatever they want, without involving other people, that's just asking for trouble.
there's no way that we could really be able to be sure that we would win on a particular situation even if your friend does tell you on spending that amount then
for sure you would really be having questions in mind on how the heck he would be allowing me to bet if he could do it on his own? Is this type of believe
that he had in mind that it might turn out to be a lucky if you do able to make others bets for you? Just make no sense.