This is my method in earning bitcoin. I go for forum site and faucet site for earning capital funds. Then invest my bitcoin to online investment site. Other option is trade my bitcoin in trading site. Buy for stacks and sell it as price is up. And last option is gambling I try my luck to bet to grow my bitcoins.
i think gambling is not a easy way to earn bitcoin because it is game which depends upon the luck . so i think you should adopt all the ways to earn bitcoin that you hve mentioned in the post but keep distance from gambling .