My oh my! Since a few days back my blood pressure has being spiking higher and higher, seeing the price of Bitcoin doing a freefall. I know its prudent for an investor not to panic when the market falling, but I can't help myself starting to panic. I believe that it'd be sensible for me to sell all of my Bitcoins and wait for a suitable time to reinvest.
If you are this sensitive, the best for you would be to sell and never look back.
Bitcoin price fluctuations can be wild and some just cannot handle that. And you seem to be part of that category. This means that it's better to take care of your health, even if this means you may be losing now some bucks and may be missing the opportunity for some easy money at some point in the future. Because if your blood pressure cannot handle this, it may not handle well also a (hypothetical) jump to 90k and another (hypothetical) fall back to under 50k or even under 20k.