How can you earn 40 dollars a day in bitcoin?? , let's share the knowledge on this topic , and hopefully we get more success after share my experience in here
There no shortcut to earn the amount you want to earn, the only way to earn is get yourself a huge amount of referrals on freebitco.in use reward points to earn more satoshi's and then get interest, another way whatever coins you have put it in freebitco.in and earn daily interest. Then you could get yourself in a signature campaign and that's the best way to earn some serious money. Ico is another option, and you could take part in the bounties. There is a gambling pot of premier league in case you follow it, some serious cash to be made.
True said, There is no easy way to earn money easily and 40$ a day without having a skill.
Today in the world we live wants work for money and no one will give you a 40$ in bitcoins each day without doing hard work in your profession also i am not saying that it's impossible to make 40$ each day.
You can provide your services look for bounties and giveaways on this forum for extra income but this income is not stable at all.