Why do you panic? Why?
IF YOU DO NOT SELL, YOU DO NOT LOSE ANYTHING! YOU LOSE THE MOMENT YOU SELL, after you purchased high and buy low. It does not matter what is the price ATM, the only thing which matters is what is the price when you decide to sell. So, to shield yourself from losing money, DONT sell under the price you bought it.
If you trust in crypto and believe it ll bounce back, WHAT THE FUCK IS THE PROBLEM AND WHY PANIC?
If you do not trust in crypto and you have doubts whether it ll bounce back, well, in that case you are in the wrong industry and you shouldn't have invested in crypto in the first place.
So knowing this, what is the problem again?

nice said, It is a bit wrong, but yeah, if you do not trust crypto - what are you doing here!?!?
But about the
investing and
not losing until you sell... - you are wrong.
You will lose even more if you do not sell and it crashes to 0...
The question is why you got in when it was that high and if you did and now you panic, you deserve to lose your money, as you have trowed them away the moment you buy something you have no idea what it is and what is happening with it...
In other news: the price will be going down for few months to come, at least, so maybe it is a good idea to think how you can benefit from all this movement.
But again be careful and DO YOUR HOMEWORK!!
NEVER INVEST MORE THEN YOU CAN LOSE!!!
Never invest in something you do not understand...
and so on

Good luck and happy to see my expectation of downtrend in jan 2018 was correct...
Let's see if / when it will hit my target for bottom...
What are you talking about? If BTC crashes to 0? In my mind, THIS IS NOT POSSIBLE. Ever.
If you really even contemplate the possibility of BTC being 0 one day, well, I can guarantee you re in the wrong industry. You know who rambles about BTC going to 0. Roubini and similar so called expert who have never turned on PC in their lives, not to mention understanding crypto mechanics.
Have some faith my friend, this is a beautiful new industry in its infant stage but it WILL prevail. I have been in crypto since 2012 and I know a think or two about crypto. Crypto will continue to grow, we ll have these red periods from time to time but it will continue growing and developing.
0 is not an option.