Guys if you are dealing with Bitcoin than you must hear the name of BLOCKCHAIN actually it is a bank in which we can store bitcoin as much you can .But there is a disadvantage of it as it take transaction charge to sent bitcoin to other but it is also usefull because if any transaction is not completed there would return your bitcoin in your wallet . They also dont reply the solution for any queary soon they take a lot of time, It is quiet secure becoz if anyone get you wallet id and pasword they wount able to qpen your .As aprocess you have to first open your gmail account and then you wallet