GUYS have you tried CryptoTab in your computer? So this is time to start it now.
It enables you to mine bitcoin for free using your Google Chrome in your computer.
Of course the mining speed is low so it will take forever to really get some money.
But that's not true. When you invite your friend by refer new users, that actually helps you to earn real money for free.
Infact we actually use only 20-30 of computing capacity of our computer. So why can't we use the rest of the capacity to make some money?!!
Just join as soon as possible and start mining and inviting your friends.