Bitcoins have three useful qualities in a currency, according to The Economist in January 2015: they are "hard to earn, limited in supply and easy to verify". Economists define money as a store of value, a medium of exchange and a unit of account, and agree that bitcoin has some way to go to meet all these criteria.
i don't think that earning bitcoin is hard. Let's just that this post of your's one step for earning bitcoin. Almost all of us here in this forum is here to earn money. Practically saying you won't waste a time to post something here if you don't have interest on money