This is a question only yourself can answer. If you have invested in Bitcoin them either you did it because you believed in it or believed you would make money from it.
As Per any investment it’s never easy and what goes up often comes down the problem with BTC is the gains and losses are huge.
I’m not sure on your financial situation or how much loss you are at however when ever I have taken a loss I use a method called dollar cost averaging.
Which basically mean you buy at the lower rate if you can afford to so your average buy price is reduced so if and when prices increase your average buy price is a lot lower allowing you to catch up to your break even point and it’s always worked for me.
I hope that helps and remember your not the only one.