When something start and people see that it can be successful they will milk it as but as possible.
I have also noticed it that when selling Bitcoin the buy always negotiate from what the exchange has already calculated. Some of them have an argument because they do write it in their bio so before you trade with anyone you should try reading their write up, if you are hit cool you avoid their ads.

But I have come to do now is I convert my Bitcoin to stable coin right before selling because the negotiation is less to none on stable coin because I have not encounter selling my stable coin less than what the exchange calculated.