Big amount, big risk. That gives a better chances for win but still there is no guarantee and not everyone can afford to play that big, to my opinion that is very small number of players and most of then probably professionals. You need to be a little bit crazy, I admit that and you have to be prone to risk and hazard, that comes together. Not for me, though.
Sorry friend, as far as I know a gambler wont qualify as a professional because gambling is not the same thing as the profession and I will say they are experienced people in gambling.

Yes, the greater the bet we play, the greater the risk of running out of money. Opportunities may differ based on the wishes of the gambler. In the dice, the smaller the chance of victory, the greater the amount we receive.