The United States have strict regulations on these cryptocurrencies, but not outright banning them like what the Chinese government did. However, assuming that it’s gonna happen, it will cause a huge impact in the entire crypto market. We could see a decline not just on the price alone, but for the number of wallet holders as well like what is happening in the UK now.
They are making money with bitcoin so there's no reason to ban it, All they can do is regulate and put some restrictions on its usage on its country. But so far, i dont see them going after bitcoin like china did anytime soon.