It depends on what actually caused the drop that big. If there's nothing wrong with bitcoin fundamentally and that people just got bearish for whatever BS reason, then I'd surely be drooling and pouring capital into bitcoin.
If the cause of the drop is not that alarming, then it’s always best to buy more and accumulate more to fill in your portfolio. Sometimes, the price of bitcoin drops drastically without having us unaware of its cause, but as long as there are no serious implications on the price drops and on bitcoin fundamentals, then we should still focus on maximizing bitcoin most especially when it’s price has return to $1k.