Right now i am planning to buy btc approx 3-4 btc and just hold them as i guess the price of bitcoin will increase in future and i will get some good profit.But i want to know what is the risk involved.Can bitcoin price decrease and is this right time to buy the bitcoin.
Like any other investment this will have its risks too so you shouldn't invest more than you can afford to lose. However, it is very unlikely that you will lose all your investment when you invest in Bitcoin. I think in the case of Bitcoin you might lose up to 20% in a short term and if it's a long term investment then it is almost guaranteed that you will be in profit.