In my humble opinion, yes that would be so risky if you don't know how to hold your coins properly. You might get lose all of it when the time that bitcoins get down. So, what I did is that I cut 50% of my coins and put it into my bank savings account and that's it! Sometimes I also use my coins for trading, but that is for long term investment and as of the moment I raised my investment into 30% which got useful for me as a newbie to this kind of industry.