I almost didn’t include this method but on second thought you should know about it. This is not a way to earn bitcoin per se but other cryptos and you have to wait for it to be available.Airdrop is a way through which crypto companies grow their community by giving tokens to individuals to perform certain tasks such as joining their social media channels. These persons can then sell the token for bitcoins when it gets listed on an exchange.Note, however, that airdrops can be a waste of your time because most crypto projects fail so its token doesn’t get listed on an exchange. Thus, make sure the crypto project is solid before participating. You will sign up and verify your account on blockchain.info. Once verified, you will be qualified for airdrops that have been vetted by blockchain.info. These projects have a high success probability.Secondly, signup at airdropalert.com, airdrops are listed there regularly and you can participate to earn.Bitcoin fork, on the other hand, occurs when there is a change in the software of a cryptocurrency leading to the creation of two versions of that coin.For example, if you had 1BTC on the 1st of August 2017 when a Bitcoin fork occurred to create Bitcoin Cash, you will also have 1 Bitcoin Cash (BCH) which you can exchange for Bitcoin.Bitcoin is not the only crypto that has forked. Other cryptos such as ETH have forked in the past. Thus, if you know a coin is going to fork, you can buy that coin and sell it off after the fork.