I shall start buying when the price drops another 5 to 10%. That shall be the bottom as there are still demand for bitcoin.
Just don't be too greedy with waiting for the bigger dip. We already know that bitcoin has the potential to go as high as $5000 quite easily.
So as soon as we will enter Bull market price will soar, Chinese drama is here to bite us in the ass like is used to do in the past.
And exactly like in the past Bitcoin will grow stronger this time - every single price decline is just another good entry point. Don't waste it.