Bitcoins are the famous online currency accepted all over the world. In India 1 Bitcoin equals to approx. INR Rs.15,000/-. It's rate increase as well decreases with time. It is a great source of earning by sitting at home.
For earning Bitcoins you must have a "Bitcoin Wallet" where you can collect all of your bitcoins.
I use XAPO Wallet and I recommend this to you also. It's design is very simple and easy to use. If you have an android phone use can use XAPO app from Google's Playstore.