Besides technically speaking a law that affects only 3% of the world (ie. US population) should not change anything about bitcoin's future. Granted some weakling countries such as parts of Europe could possibly follow if pressured, but you think people in El Salvador, Japan, Venezuela, Switzerland, Germany, Ukraine, Iran, most of Asia and ... give a shit what law US passed?
The EU is much weaker than it may seem to someone, we just need to remember how the leader of the same EU (Germany) reacted when it was discovered that the US secret services were eavesdropping on the German Chancellor - almost nothing happened, and it was a political scandal for which the US would crucify a country and impose all possible sanctions on it if it happened to them. The strong influence of the US on the EU has lasted since the end of World War II and the fact that there are still about 90 000 American soldiers there - who or what are they keeping 80 years after the end of the war?
Japan is more or less also under the influence of the US, something similar to Germany, there are over 50 000 American troops there - and if you look at the relationship between the two countries, Japan mostly does everything it is asked of. Ukraine is perhaps the easiest target of all, as it depends directly on US assistance to prevent further loss of territory to which Russia does not hide its claims - so it will pass any law that suits the US.
You have forgotten India as the second-most populous country in the world that fully supports the US, and one should only remember that they literally copied every American decision when it came to US sanctions against China.
The only countries that openly oppose the US are North Korea and Iran, which are still avoiding the fate of Iraq and Afghanistan, but it is only a matter of time before they feel the power of Western democracy on their skin.