Let me correct you that Bitcoin isn't that easy to earn. It needs much hardwork, patience, and determination to be able to earn it. Anyway, Bitcoin have been use as mode of payment in numerous websites over the internet in the past few years until now so it's not new anymore. In some countries, they also use bitcoin as payment when buying foods in a convenience store. For now, bitcoin will continue to be the form of payment on the internet only. Due to our government which has the power to decide on what currency a country will use in our daily lives, it's hard to say if it'll be the new era of currency that will replace our current currency now.