Well, things may be a little more complicated than that
The truth is, we don't really know what Donald Trump's main focus is. I mean if it is actually about rejecting (read, banning) Bitcoin (if we assume he has been focused on cryptocurrencies at all, at least once in a while). As you correctly point out, the US is the strongest and largest economy in the world, so no matter how strong Bitcoin can potentially become, America will be the last to get hurt by it
The apparent implication is that it doesn't make sense to ban Bitcoin or any other cryptocurrency as they are not threatening the American dollar global supremacy (unlike Libra which could actually become a real pain in the ass). On the contrary, it makes sense to use cryptocurrencies to disrupt and destabilize weaker and weak economies with them (like the economy of Venezuela) by turning Bitcoin and other coins into economic hitmen of sorts