Definitely, If we are talking about Exchange than it really risky way, because since last few years many time exchange has been hacked, and recently BITFINEX give us the poof that exchange is not safe, these are not safe-sound way for bitcoin and also for us.
But if we are talking about Bitcoin, than definitely bitcoin is safe, because bitcoin has been spend too many years and still it is going well and up.
The bitcoin price has risen in the last few hours together with the Japanese Yen. It is regarded as safe haven.
It is called fluctuation and it is normal for every currencies and even investments. I agree that price will not guarantee the survivavility of bitcoin, what guarantee survavility is the development, base users, and new users that is adopting bitcoin. And I think bitcoin is strong because he all have this three things that is needed to survive.
Fluctuation in the price or value won't happen with every currency. Fluctuation happens with most of the digital currency as well investments. This fluctuation while getting certain number of user profile or continued adoption it becomes stable without much fluctuations