President Trump's attitude, which tends to be anti-Bitcoin, has raised the discourse that he could forbid the ownership of Bitcoin for citizens of the United States (US) in the future.
This discourse is based on two possibilities, namely Trump's tweet in 2019, that Trump is not a Bitcoin lover and second is a recognition of Trump's similar attitude, as stated in the book by John Bolton, a former White House security adviser.
Responding to the discourse of a possible ban on Bitcoin ownership, many people say the most likely action is an aggressive step by the government in dealing with laundering crimes related to Bitcoin and other crypto assets. Direct banning seems impossible, because Bitcoin is practically outside the structure of the country.
It seems that the majority of popular US politicians are against Bitcoin. Trump is, of course, no exception. But he's been in office for years without making his move (only some angry tweets, but he makes them on many topics). So I really don't think he'd try to make it now, when there are important problems the US has to deal with. Moreover, given the strong democratic institutions of the US, I am pretty sure he cannot prohibit Bitcoin. He's the president, not the king. Not to mention that even the banks are warming up to Bitcoin now that it's the best performing asset of the year, so the US might need Bitcoin in the future.