For people who bought into BTC before the start of this year these kind of price fluctuations do not bother them too much. Totally agree if somebody just getting in now cant deal with seeing their invetment drop by 30, 40, 50% then try and wait.
Use a GDAX.com account with your same user name and password from Coinbase and set some buy orders to capitalize on the huge price movements.
On the other hand if you see the future potential of what the price of BTC could be then just buy in and then close your eyes for a year.
Always remeber, dont put the money that you need to survive off into anything that has risk like this. And if anybody wants to protect themselves against financial collapse then firstly buy food and secondly physical silver.