That depends on how deep your are in with bitcoin.
If you took more risks than you shouldn't have, then it is probably a good idea especially if you have some profits. If the amount is not that big then stay in the game bitcoin sometimes make surprises too.
Tbh I don't see bitcoin making a new ATH in this situation we are in. It may not go down but may stay around these levels for a long time.
It all depends on how much you invested in and if you are going to need that money in the future.
Our decisions on selling should be depends on our goals, if we have a plan then we should follow it. Target profit is important for those momentum and swing trader, but if you are holder target profit is not important but trailing stop is the one that we should consider as important in order to protect our gains. Before we sell or buy a bitcoin, we should have plan that we should follow in order for us to lessen the mistakes that we are going to make.
Aiming for the target profit is fine but what if it never comes? What if you are chasing a ghost?
These are also the possibilities. Just because bitcoin went up till today doesn't mean it will be going up forever. It is possible to stay at 10k for the next 10 years while it is also possible to reach 20k and go back to 5k again.
What if the bear market isn't over that started in Dec 2017?? That's a one big if.
I used to aim for a target profit too but I realized it created unnecessary stress on me. For me it is better to buy and forget. Don't look at the charts, invest small so it won't bother you when it goes down.