There are many ways to buy bitcoins, and some of them are available in almost every country in the world. At your service are gift cards, bitcoin-ATMs, local traders, brokers and stock exchanges.
I buy bitcoin through the poloniex . Poloniex is an online money trading website in where you can invest your bitcoin. You can also buy a bitcoin in here and then wait until the value of the bitcoin becomes higher and after that you can also sell your bitcoin and gain so much money as an interest to your investment.