From a historical, technical perspective it could drop down to 25k or even 20k, as we started a run up to 15k in the very beginning and reached a bearish position down to 3k, which is 1/5 from that first high.
Another bull run went all the way up to about 57k and dropped back to 15k, which again is about 1/4 of the second reached high.
So if we expect a new bullrun to reach ~200k, a drop to a max of 40k could be realistic. Should a bullrun end already on a 100k, then a drop as mentioned above (25-20k) could be an option also.
IMHO after this halving we probably wont see anything below 20k again.

And Im very optimistic that we will cut the 100k on BTC this upcoming halving with this extraordinary greed right now.