I think Bitcoins saving is quite risky, because compared to other forms of investment such as gold or dollars, cryptocurrency is more risky because the possibility being hacked is so high, we could be stolen bitcoin or the ability the network system attacked, you lost all bitcoin in the second. In addition,fluctuations in bitcoin price are highly impacted by the market so investment in bitcoin is unsafe solution. 
There's a lot ways to secure your wallet for example is you can save your key offline and there is a lot of counter measure you can do to keep it safe, and the fluctuation is normal and sometimes the value of bitcoin can double it's value from its previous highest value so please don't spread panic or misinformation