It was this summer for 2k $ )) I have already earned 20k $ from that but I am very afraid now )
If you cashed out some and you are on profit, you better hold, you have nothing to lose and the chance for gains is still big.
If you are on profit only "on paper", cashing out
some may not be a bad idea, but keep in mind that this is not the first and probably not the last correction Bitcoin will have and you
may cry in a couple of months because you've missed something big.
The decision is tough and it depends on factors only you know. And you know already that selling low is not a great business.