I earn bitcoin by mining the other coins such as Ethereum, Decred or Siacoin. Then I sell them to get some bitcoins.
Yup, it does add to the fun and income in our lives. Because it was included in a favourable trading and I think it will always be profitable until whenever, except it does not have an active user again
Whatever way to earn bitcoins you choose just don't try any of these cloud mining/hyip/ponzi/whatever sites,99% you will lose your money there,even in gambling you have much more chances to win some bitcoins.