Well any kind of investments is a risky thing. But cryptocurrency has always been "a bit riskier then others" due to price mad volatility. Nevertheless lot of people doing amazing profit with that sphere.
And if you are not about buy-sell, I don't think Bitcoin do any treat to you or the world in general.
Sometimes bitcoin is risky because this is a crypto currency and or digital currency and have a volatlile in nature mean that things or the value is not fix, if you will invest make sure that the money you will put on investment start in small amount do not start in big amount so that you will not get hurt of your money invested if the value of coin will suddenly decreasing.