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 this is not the easiest way to earn Bitcoin, this is actually the normal way to earn it. And this method can't be called as "The Easiest Way", it should be called "The Way to earn Bitcoin" because this method requires a lot of ways to do.