Actually there is nothing US government or any other government from other countries can do against cryptocurrencies, because they work in a decentralized format out of governments' control. Authorities can impose how many bans they want on crypto, and their citizens will still use and invest on it, like we have been seeing in China, Egypt, Bolivia and other countries where crypto is illegal.

To deal with crypto is already part of the daily and private routine of many people around the world. It can't be stopped anymore and governments aren't fool: they know about that! So why to start a conflict for something that is out of their control and that can't be solved as they desire? Of course they will go through the diplomatic route.