I think the risk of investing in bitcoin will depend on several things. Like your skills, your knowledge of bitcoin markets, etc.
When you have deep knowledge and skills about bitcoin. Certainly the risk of investing in bitcoin will be smaller?
Correct, the risk of bitcoin investment is depend on several things, if a person has more skills and more knowledge of bitcoin market and also studying just that how we invest our money in bitcoin. He has very easy to invest money in bitcoin and also reduce own investment risk very easily.
I think that for investment in bitcoin does not need special knowledge and skills, so they are great for beginners. You need to buy when they fall in price, and sell when they have grown enough. And the risk is about the same as in other investments.