Any policies carried out by big countries are of course very impactful, but we should be happy because the USA legalizes bitcoin and regulates cryptocurrencies, it is only natural that some of the top exchanges based in the USA get high trust from investors, and of course the US government sees that there are opportunities and benefits to be had by legalizing cryptocurrencies.
The United States is also just a country in the world, they do not have the right to control or dominate the whole world. I mean, if they don't legalize bitcoin, there is nothing to fear, bitcoin can survive and thrive without them. They need bitcoins, bitcoin doesn't need them, as long as there are other countries that accept bitcoins, it doesn't matter if the US legalizes bitcoins. Bitcoin is the technology of the future, if they don't accept it, they will become obsolete, being a power they have to understand that.