Its not much risky to invest in bitcoin. Only the thing is you have to confirm the market condition of bitcoin. If prices are less then buy it. N if the are increasing then sale it out. Its the different strategy you have to be careful about it.
Of course it is risky. You just have to look at the volatility of the price to see that the potential to make losses if you time it wrong as much larger than most other assets you could invest in. The other side of risk is reward and the potential gains of investing in Bitcoin reflect the risk involved. It's not possible to find a risk-free investment and the greater the potential gain the greater the risk.