There is always a risk in buying bitcoin . There is no guarantee  that the price of bitcoin will rise or fall. There is no guarantee that when your country's government will declare bitcoin as illegal. Investing in bitcoin and assuming that one will get profit from it by keeping it for a long time is like taking a leap of faith. It is better to hold bitcoins for less time and then invest it . Bitcoins should get split in to different and safe offline wallets as there is lesser risk of loss in such condition.