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.
Trump could never appoint someone like Elon Musk because Elon lacks experience in public service and isn’t well-versed in securities laws or finance. The role needs someone who’s a lawyer, accountant, or has a background in finance. Plus, even if Elon were qualified, he wouldn’t waste his time as SEC chair as he's got bigger things to do, like preparing Mars for us.