If he's advised to change course on bitcoin he'll do it. He's said things many times. Trump isn't reliable he's changing his mind every day. He says something to the press yesterday & changes his words today. If bitcoin's going to be strong global reserve Trump & El Salvador can't do it alone.
The US government recently established the Strategic Bitcoin and that marked a significant shift in the country's federal cryptocurrency policy. If the world's largest economy can launch such initiative through an order signed by the county's president himself, then what makes you think Bitcoin can't become a global reserve asset? The truth is that Bitcoin is gradually dominating the global finance system so you shouldn't be surprised if more governmental bodies adopts the policy