Recently, I've been trading bitcoins on btc-e, earning only a little, yes, very little, except the fees that btc-e takes.
Besides trading, are there any good method to earn bitcoins? Thanks.
If you are asking only of earning bitcoin, we have bitcoin faucets, or altcoin faucets that can be convert into bitcoin.
Then the person can also participate in joining the signature campaign in the ico project.
In my opinion, there are two ways of earning bitcoin, or any other currency, one which is hard work and require skill and has a guaranteed revenue, the other one is a lazy way and doesnt require much skill and it is based on luck so your revenue is not guaranteed, and it also requires you to spend money on it.
Fianlly this comes from the general idea that people are lazy and always looking for the easiest way to earn money, so it is a field for scam and frauds.