There will be no free bitcoin. It is a very easy thought to be fooled. You can choose the form of bounty to earn the bitcoin. But I think you need to have persistence and effort by being positive, hardworking in bounty campaigns such as signatures, facebook, twitter . Bounty can give you a good source of income. If you are lucky you will be able to collect the BTC with great effort. To be quick, you should learn how to invest.