Gambling is the fastest way to double your bitcoins in a day or even in an hour if you are really lucky. Life is a gamble anyways so it's up to you to decide on that.
if you believe in life is a gamble then you must believe in do or die too. If you go for gambling then you can make profits if you are lucky. Otherwise it will become a poor. Never suggest gambling a way for doubling your bitcoins and never go for do or die options.