If you see that you're already good with your profits then there's no problem to sell in my opinion, wherein if you achieve your target price as well it's all good probably,, indeed the bull run was really impressive this year and for sure mostly of us here are profitable.. It's always good to be true, i mean dump if it's needed because it's not a good decision to be honest to expect more despite of the next situation, although there some analyst saying bearish will not the same before, we must take the opportunity while it's not late and buy again when market is ready to bump again.
We do have different styles, if you are a short-term investor, it would be easy for you to sell your assets to take profit as you can just buy when the price dip and you will get it at a good value, that's how simple it is.
However, there are investors who have a high target of profit, they will only sell when they will achieve their profit, and usually, the target is high like x50 or x100 return as it's still realistic since it happened to some of the altcoins in this bull run.
The point here is, don't depend on the market situation, always focus on the goal as bull run may go but it will again come back to have a bigger run.