I store it in my online wallet, and exchange like reliable poloniex. Also local wallet is a good option for me.
i think most the people who use bitcoin mostly keep their bitcoins in online wallet. i think it is one of the most reliable and convenient way of making money.
What are you talking about? Online wallets are by far the least reliable sort of wallet because you don't even own the Bitcoin and rely on a third party which could collapse like Mt. Gox. It's also not a way of making Bitcoin either.