Block Chain is one of the biggest technological change in this era . It is also refer as Internet 3.0. The world has seen the transition form Web 1 (Wire less communications system on mobiles ) to Web 2 ( Internet) . Now it’s time for 2nd biggest transition after Internet. We are going to through the transition from Web 2 to Web 3 (block Chain). Because we believe that, from this decade (2021) onwards most of the technology is going to make a transition towards blockchain.