First of all, it is guaranteed that the SEC chair will be replaced by a new one. Trump has said that he will fire Gary Gensler if elected.
It’s pretty much a given. Any new president will replace officials not on their side, especially appointees. But what will the new SEC chair do for Bitcoin? As far as I know, Gary Gensler was known for saying Bitcoin will never be a currency.
Like I said, Trump will most likely appoint someone from his own party preferably someone in his inner circle already. If he could elect Elon Musk as the new chair, he might just do that. Who knows? But I know that Trump will never put someone against crypto if he is really serious about his plans with it. Without SEC breathing down exchanges and wallets' necks, there will certainly be more interest in crypto since investors/traders will not fear against laws anymore.
So, could the new chair help push Bitcoin to be recognized as a currency rather than just property in the US?
I would hope so but it will be a long process and certainly not something that can be done over night. Many projects and policies would need to be passed during Trump's term for bitcoin to be recognized as an official currency.