There is and easy way to earn bitcoin. Its not the only way im mining cryptocurrencies ,but most efficient for my peice of hardware.
It works like that ..... Your letting your CPUs and GPUs help solve complexed algorithms and getting share of BTC or other currency for it back. Isnt it great? Specially CRYPTOTAB BTC mining webbrowser extension https://getcryptotab.com/372349 my favourite yet. Mines very fast, and isnt as hard on the power consumed. I use also Minergate https://minergate.com/a/e7eb41606ff68dd0c0d3c82f in this one you can mine many currencies (Monero, Dash, Aeon, ETH- very difficult to mine), get rewards from achievement program. So go ahead a try both
MIners Cheers