You can double your coins with gambling for sure the only thing you need is a little courage and high level of luck, if you have both the things then you can double your coins in a single day.
That's wrong, instead of doubling your coins by gambling most likely you will lose all your hard earned money in just fractions of seconds, because it's very risky method and there is no guarantee of earning there. I don't advice to try this risky method
Different individual have different habits and they have their own way to make money, if he can afford to take risk and if he loves gambling then no one can stop it from it.