The risk level depend on kind of invest you're going to do. There are some way to invest in Bitcoin like trading, gambling, ICO or HYIP. With trading and ICO it's safer than gambling and HYIP but you still need to have enough experience and knowledge before invested in it. Beside you also can invest in gambling or HYIP but I think you shouldn't do that, these ways are too risky.
When investing it is always teamed up with the risk. They say if the risk is higher then you will gain higher. But you are right, it becomes more risky when you put your bitcoin into hyip and gambling. Be sure that the bitcoin you put there is the amount of bitcoin you are willing to lose.